Historic Markers in Pennsylvania

Pittsburgh, PA · est. 2016

Established in 1804, the McClurg Iron Foundry was Pittsburgh's first air foundry, casting metal in a young industrial city perched at the gateway to the West. During the War of 1812 it forged cannons and ammunition, much of it destined for the American fleet that would contest control of Lake Erie. In 1835 the site achieved another milestone, producing the first locomotive steam engine built west of the Allegheny Mountains.

Lewistown, PA · est. 1967

This Lewistown home was the birthplace of Frank R. McCoy, a West Point graduate whose long career carried him from the Spanish-American War through both World Wars. A soldier-diplomat as much as a general, he served on international commissions and led the Foreign Policy Association, helping shape how Americans understood their growing role in the world. His life spanned the era in which the United States rose to global power.

McDonald, PA · est. 2012

When oil was struck here in 1890, the McDonald field roared to life, and by 1891 and 1892 it was pumping more oil than anywhere else on earth. It stood second only to the famed Bradford field in Pennsylvania's history, and helped drive the state to its all-time record output of more than 31 million barrels in 1891. Nearby gushers like the Mevey No. 1 and Mathews No. 1 set the state's highest daily production rates.

Cochranton, PA · est. 2023

Long before European settlers reached northwestern Pennsylvania, Native peoples built successive palisaded villages along the French Creek Valley, occupying this ground from roughly 1100 to 1500 AD. Excavations here uncovered evidence of a life balanced across the seasons—hunting, gathering, and small-scale farming—along with a distinctive shell-tempered pottery style archaeologists named McFate Incised. That signature pottery has since helped researchers trace the movements and trade connections of the region's Indigenous communities.

Smethport, PA · est. 1981

Formed in 1804 from Lycoming County and named for Pennsylvania governor Thomas McKean, this northern county long drew its living from oil, gas, and timber. In 1861 the county seat of Smethport became a mustering ground when the celebrated "Bucktails" gathered here, a hard-fighting Civil War regiment known for the deer tails pinned to their caps. The name marked a rugged frontier people answering the Union's call.

McKees Rocks, PA

Rising sixteen feet high and eighty-five feet wide, the McKees Rocks Mound is the largest Native American burial mound in Western Pennsylvania. It was raised by hand by the Adena people between about 200 BC and 100 AD, and later peoples—the Hopewell and the Monongahela—continued to use the site. Nineteenth-century excavations recovered thirty-three burials along with artifacts of copper and shell.

McKees Rocks, PA

This monument in the old mill and railroad town of McKees Rocks, on the Ohio River just below Pittsburgh, honors the local men and women who left home to serve in the nation's armed forces. Communities across industrial western Pennsylvania sent generations of sons and daughters into uniform, and memorials like this one gather that collective sacrifice into a single civic place of remembrance.

Huntingdon, PA · est. 1955

David McMurtrie built this substantial house in 1817, when Huntingdon was still a young town on the Juniata. The McMurtries were a pioneer family who took the lead in local politics and business during the early republic. Fittingly, the mansion now shelters the Historical Society and the Library of Huntingdon County, keeping the community's memory under the same roof that once housed its founders.

Conewango Township, PA · est. 2021

Along the Allegheny River, archaeologist Dr. Stanley Lantz of the Carnegie Museum first identified the Mead Island culture in 1967, on the island that gives the tradition its name. Excavations there and at other sites revealed a Native American people who dominated the Middle Allegheny River Valley during the early Late Woodland period, roughly 960 to 1360 AD. Their villages and material culture help fill in the long human story of the region centuries before European contact.

Jefferson Township, PA · est. 1999

Beneath a sandstone overhang in the hills of Washington County lies one of the most important archaeological sites in the Americas. When farmer Albert Miller reported artifacts here in 1973, University of Pittsburgh archaeologists began peeling back layers of deposits that reach back nearly 16,000 years — pushing the story of human presence in North America deeper than almost anywhere else on the continent. Its stratified record preserves an unbroken sequence of the peoples who hunted, camped, and lived in this valley across the millennia.

Jefferson Township, PA · est. 1999

This marker records a rare official gesture: Pennsylvania's naming of Meadowcroft Rockshelter a "Commonwealth Treasure." The designation set the deeply stratified site apart as a public trust, calling on citizens to protect and preserve a place that holds evidence of the state's — and the continent's — earliest human history. It reflects how a working farm's chance discovery became recognized as belonging to everyone.

Meadville, PA

In 1788, David Mead and a small band of settlers pushed west from Pennsylvania's Wyoming Valley to plant a settlement on French Creek, in country only recently opened to American pioneers. The town they founded grew quickly enough to become the seat of Crawford County by 1800, and it went on to leave two very different marks on the nation: in 1842 it staged what is remembered as the first direct primary election in the United States, and decades later it became a cradle of the 'hookless fastener' — the humble zipper — turning a frontier outpost into an unlikely engine of American invention.

North Union Township, PA · est. 1946

Rising on a hilltop in 1802, this elegant Georgian manor announced that the western Pennsylvania frontier had grown wealthy. Its builder, Isaac Meason, was a Revolutionary War veteran turned pioneering ironmaster who helped make Fayette County an early center of American iron. In 1817 at nearby Plumsock he erected one of the country's first rolling mills, an innovation that would soon transform how the nation made its iron and steel.

Philadelphia, PA · est. 2004

In 1827 Philadelphia workingmen banded together in the Mechanics' Union of Trade Associations, the first body to unite laborers across many crafts into a single central council. Rather than speaking for one trade, it represented workers as a class, campaigning for the ten-hour day and pressing into politics and workers' education. Historians mark its founding as the beginning of the organized American labor movement.

Philadelphia, PA · est. 2015

In 1898, at the close of a century that had transformed medicine into a science, a small group of American and Canadian physicians and librarians met in Philadelphia to solve a stubborn problem: doctors could not easily reach the reliable, up-to-date medical literature their patients' lives depended on. Their answer was the Medical Library Association, the world's oldest body of its kind, dedicated to organizing and sharing trustworthy medical knowledge. Among its founders stood the celebrated physician Sir William Osler and the librarian Margaret R. Charlton, pairing clinical prestige with the emerging profession of medical librarianship.

Eldred Township, PA

In the mid-1700s the Moravians, German-speaking Protestants known for their missions among Native peoples, established a station called Meniolagomeka in the Pennsylvania backcountry that operated from 1749 to 1755. Like other Moravian missions of the era, it drew Indigenous converts into a shared community until frontier tensions in the 1750s brought it to an end. The Moravian Historical Society set this memorial in 1901 to keep the vanished settlement's memory alive.

Mercer, PA · est. 1983

Mercer County was established in 1800 from Allegheny County when this corner of western Pennsylvania was still thinly settled frontier, home to just over three thousand people. It honors General Hugh Mercer, the Revolutionary War officer mortally wounded at the Battle of Princeton in 1777. Rich in iron ore and coal, the region became an early center of industry, and the county seat of Mercer was incorporated in 1814.

Philadelphia, PA · est. 1992

Founded in 1907 by African Americans, Mercy Hospital gave Black doctors and nurses a place to train and practice at a time when other Philadelphia hospitals excluded them. It grew quickly, building a larger facility here in 1919 to meet the community's needs. In 1948 it merged with the Frederick Douglass Memorial Hospital to form Mercy-Douglass Hospital.

Pittsburgh, PA · est. 1994

When the Sisters of Mercy opened Pittsburgh's first hospital in 1847, the booming industrial city had no institution devoted to caring for its sick and injured, least of all its poor. The order quickly made it a place of teaching as well as healing, launching medical internships the following year and one of the era's early nursing schools in 1893. As the first Mercy hospital in the world, it became the seed of a Catholic health-care network that would spread far beyond Pittsburgh.

Lower Merion Township, PA · est. 1967

Raised in 1695 by Welsh Quakers who had followed William Penn's promise of religious liberty to his new colony, this meeting house is among the oldest houses of worship in Pennsylvania. Tradition holds that Penn himself worshipped within its walls, and the unusual cross-shaped plan is credited to the Welsh carpenters who built it. It has gathered Friends for silent worship continuously for more than three centuries.

Philadelphia, PA · est. 2003

With William Clark, Meriwether Lewis led the transcontinental expedition of 1803–1806 that opened the newly purchased Louisiana Territory to American knowledge. Philadelphia, then the young nation's scientific capital, was where Lewis prepared for the journey and where he later deposited many of its precious specimens, journals, and artifacts. The city's naturalists and institutions helped translate the expedition's discoveries into lasting science.

Chambersburg, PA · est. 1973

In late June 1863, as the Army of Northern Virginia pushed deep into Pennsylvania, General Robert E. Lee made his headquarters in a grove near Chambersburg. From here, between June 26 and 30, he issued the orders concentrating his scattered forces toward Gettysburg—setting in motion the campaign's climactic collision. The quiet woods became a pivotal command post on the road to the war's most famous battle.

Philadelphia, PA · est. 1992

Meta Vaux Warrick Fuller was among the foremost Black sculptors in America, working in an era when both her race and her gender stood as barriers to recognition. From this Philadelphia home she pursued an art shaped by study at the Pennsylvania Academy of the Fine Arts and, later, in Paris under the great sculptor Auguste Rodin. Her powerful figures gave form to human suffering and the African-American experience.

Harrisburg, PA

In the spring of 1846 the United States went to war with Mexico, and thousands of Pennsylvanians marched south with the volunteer regiments raised across the state, fighting through the heat and disease of campaigns from the Rio Grande to the gates of Mexico City. Two decades later, in 1868, the Commonwealth raised this monument in its capital to gather the memory of the sons it had lost in that three-year conflict. Standing in Harrisburg, it is one of the earlier state-sponsored war memorials in Pennsylvania, erected just as the nation was also beginning to reckon with the far greater losses of the Civil War.

Mount Pleasant Township, PA

Erected by the State of Michigan, this monument honors the men of the 1st, 5th, 6th, and 7th Michigan Cavalry — the Michigan Cavalry Brigade led by the young Brigadier General George Armstrong Custer — who fought on the fields east of Gettysburg on July 3, 1863. There, Union horsemen turned back a Confederate mounted attack intended to strike the rear of the Union line as Pickett's Charge went forward to the west.

Stowe Township, PA

This plaque marks the home of Michael A. Musmanno, a Pittsburgh-area jurist whose career stretched from the coal-country courtrooms of the 1920s to the world stage. He served in both World Wars, sat in the state legislature, and in 1947–48 presided over one of the Nuremberg trials that held Nazi leaders to account for their crimes. He capped his life with sixteen years on the Pennsylvania Supreme Court and authorship of sixteen books, and was laid to rest at Arlington National Cemetery.

Southampton Township, PA · est. 1950

Middle Spring Church was founded in 1738 by Scotch-Irish Presbyterians, part of the wave of immigrants who streamed into the Cumberland Valley frontier in the early 18th century. Its first congregation gathered near the old cemetery a short distance northwest of here, worshiping there until 1781. The present church building went up in 1847, with a parsonage added in 1855.

Lower Swatara Township, PA · est. 1952

Laid out in 1755 by the Quaker George Fisher, Middletown is the oldest town in Dauphin County, its name marking its spot midway between Lancaster and Carlisle. In the 19th century it grew into a busy river port at the junction of the Pennsylvania and Union Canals, where boats gathered before heading downriver. Early flour, lumber, and iron industries clustered around that traffic, giving the town its livelihood.

Lewistown, PA · est. 1981

Established in 1789 from Cumberland and Northumberland counties, Mifflin County took its name from Thomas Mifflin, an early governor of the commonwealth. Its seat, Lewistown, was laid out the following year as settlers pushed into the Juniata Valley. In the decades that followed the county became important to Pennsylvania's canal era and its early iron industry, twin engines of the state's rise.

Philadelphia, PA · est. 1957

Founded in 1740, this is one of the oldest Jewish cemeteries in the United States and the resting place of some of colonial and Revolutionary America's most notable Jewish families. Among those buried here are Nathan Levy, whose ship carried the Liberty Bell across the Atlantic; Haym Salomon, the broker whose financing helped sustain the American Revolution; and the prominent Gratz and Levy families. Their graves testify to a Jewish community woven into Philadelphia life from its earliest colonial days.

Rose Valley, PA · est. 2015

From her home in Rose Valley, Mildred Scott Olmsted spent more than four decades leading the Women's International League for Peace and Freedom, carrying its antiwar and human-rights message around the world. Her activism flowed from her Quaker faith and joined the causes of peace, women's rights, and civil rights. She and her husband welcomed figures such as Jane Addams, Bayard Rustin, and Martin Luther King into their household.

Lancaster, PA · est. 1950

During the American Revolution, Lancaster was a bustling inland town far from the coast, which made it a natural place to hold prisoners of war. This building served as military stables, while across the street stood barracks where captured British regulars and Hessian mercenaries were confined. Thousands of such prisoners were marched into Pennsylvania's interior towns for safekeeping after battles like Trenton and Saratoga.

Lower Providence Township, PA · est. 1970

Built in 1762, this Montgomery County mansion became the first American home of John James Audubon (1785–1851), the artist and naturalist who would revolutionize the depiction of wildlife. It was here, as a young man, that Audubon began the close study of American birds that culminated in his vivid, lifelike paintings. The site is now owned and operated by the County of Montgomery.

Donegal Township, PA · est. 1947

Jacob Miller built his blockhouse around 1780 as a gathering point and refuge for the scattered settlers of the Dutch Fork country. On March 31, 1782, in the closing months of the Revolution's frontier warfare, the post came under attack, and Ann Hupp rallied its defenders in a heroic stand that entered local legend. Such fortified strongpoints were the difference between survival and abandonment on this exposed border.

Millersburg, PA · est. 1972

Long before bridges tamed the Susquehanna, communities depended on ferries to cross Pennsylvania's broad, shallow river. The Millersburg service began around 1825 with flat boats pushed across by hand-poling, then modernized with a paddlewheeler in 1873 and gasoline engines in the 1920s. Remarkably, it endured as the last surviving wooden double-stern paddlewheel ferry on the river, a working relic of a vanished mode of travel.

Buffalo Township, PA · est. 1973

Across the Susquehanna from Millersburg, this Perry County landing anchored the last surviving ferry service on the river. Begun around 1825 with hand-poled boats, the crossing modernized to a paddlewheeler in 1873 and to gasoline power in the 1920s, when the wheels shifted to the stern. It endured as a rare working example of the river ferries that once linked Pennsylvania's river communities.

Millersville, PA · est. 1989

Founded in 1855 as the Lancaster County Normal School, this institution was designated Pennsylvania's first State Normal School in 1859—part of a nationwide movement to professionally train the teachers a growing public-school system demanded. Over the next century it evolved with the state's needs, becoming Commonwealth-owned, then a State Teachers College, then a broader liberal-arts college, and finally a university within Pennsylvania's State System of Higher Education.

Derry Township, PA · est. 2003

On this Derry Township ground in 1857, a farmer's son named Milton S. Hershey was born who would go on to reinvent American candy. After early ventures in caramel, he gambled on milk chocolate at the turn of the century and built not just the world's largest chocolate factory but an entire model town around it. With his wife Catherine, he channeled his fortune into a school for orphaned children that still bears his name.

Wilkes-Barre, PA · est. 1999

Min L. Matheson led the Wyoming Valley District of the International Ladies' Garment Workers' Union from 1944 to 1963, building a membership of 11,000 in the region's garment shops alongside her husband Bill. Facing down corruption and intimidation, the Mathesons created a model workers' education program, a health center, and even a traveling chorus—and in 1972 she rallied relief efforts for victims of Tropical Storm Agnes.

Union Township, PA · est. 1994

This ground has been called the cradle of the Whiskey Rebellion. In the 1790s a log Presbyterian meetinghouse stood near the present church, and after the Mingo Creek Society formed in February 1794 it became the organizing heart of resistance to the federal whiskey tax. Society members mustered as militia on these very grounds; some now rest in the churchyard nearby.

London Britain Township, PA

Long before Chester County's stone farmhouses and mills, this ground was Minguannan, a village of the Unami-speaking Lenni-Lenape (Delaware) whose totem was the tortoise. In October 1683, barely a year after William Penn stepped ashore, their leaders joined the wave of deeds by which Penn acquired the vast tract between the Delaware River and Chesapeake Bay up to the falls of the Susquehanna. The marker fixes a Native town to a spot most travelers would otherwise pass without a second glance.

Rose Valley, PA · est. 1947

Long before roads crossed this part of Pennsylvania, an Indian trading path ran west from the Delaware to the country of the Susquehannock — called Minquas by the Dutch and Swedes — and forded Ridley Creek near this spot. Along it moved one of the most valuable commodities of the seventeenth-century Atlantic world: beaver pelts, carried east by the thousands each year to the small Dutch and Swedish trading posts on the Delaware. This single artery tied the fur-rich interior to a global market hungry for felt hats, and helped decide which European power would prosper on the river.

Harrisburg, PA · est. 1996

Mira Lloyd Dock was a botanist, educator, and reformer whose December 1900 address to Harrisburg's Board of Trade helped ignite the city's "City Beautiful" movement. From that spark came a riverfront park system — including the Riverfront Park beside this marker — and a wave of civic improvements that transformed a grimy river town. As one of the first women to serve on the State Forestry Reservation Commission, she carried her conservationist convictions into state government at a time when few women held such posts.

Edinboro, PA · est. 2015

In the early 1950s, novelist Virginia Sorensen spent time in the rolling farm country around Edinboro, where the maple-sugaring traditions of Erie and Crawford Counties still shaped the rhythm of rural life. Out of that stay came 'Miracles on Maple Hill,' a children's novel about a family restored by a season in the countryside. The book won the 1957 Newbery Medal, the highest American honor for children's literature, drawing lasting attention to this quiet corner of northwestern Pennsylvania.

Warwick Township, PA · est. 2006

In the tense summer of 1777, General Washington gathered some 11,000 Continental soldiers at the Neshaminy encampment and made this house his headquarters for two weeks in August. It was here that a young Marquis de Lafayette first served in the field as a major general, and where the Polish exile Casimir Pulaski met Washington for the first time. Pulaski would soon organize American mounted forces and earn lasting fame as the "Father of the American Cavalry."

Langhorne, PA · est. 2010

In an era when children with intellectual disabilities were too often hidden away or written off, Mollie Woods Hare devoted her life to teaching them. In 1913 she founded the Woods Schools, which grew into a nationally recognized center blending research, education, and rehabilitation for people with special needs. Her pioneering methods drew wide acclaim and helped advance the very theory of how such children could be taught.

Jim Thorpe, PA · est. 2006

On June 21, 1877, four men accused of belonging to the "Molly Maguires," an alleged secret society of Irish miners, were hanged here in what came to be called the Day of the Rope. Their convictions rested largely on the undercover testimony of Pinkerton detective James McParlan, hired by coal interests. More than a century later, historians still debate the truth of the labor, class, and ethnic conflicts that drove the case, and even whether the organization truly existed.

Pottsville, PA · est. 2006

On June 21, 1877—a day remembered in the anthracite region as 'Black Thursday'—six Irish immigrant mineworkers accused of belonging to the secret society known as the Molly Maguires were hanged here, with four more executed the same day at Mauch Chunk. The convictions rested largely on the testimony of Pinkerton detective James McParlan, who had infiltrated the coalfields on behalf of powerful mining and railroad interests. To this day historians debate the guilt of the accused, the fairness of the trials, and even whether the organization truly existed.

Carlisle, PA · est. 1949

Mary Hays McCauley, remembered in legend as "Molly Pitcher," became one of the Revolution's most enduring heroines for her courage at the Battle of Monmouth in 1778, where women carried water to overheated soldiers and, by tradition, she took a place at the cannon. She is buried in the Old Graveyard just east of here, among many of Carlisle's distinguished early citizens.

Forward Township, PA · est. 2012

Begun in 1838, the Monongahela River's system of locks and dams became one of the nation's earliest and most successful efforts to tame a river for year-round travel and trade between Pittsburgh and Fairmont, West Virginia. Millions of tons of coal moved through its locks to feed Pennsylvania's mighty coke, iron, and steel industries. After the federal government acquired the system in 1897, the Army Corps of Engineers expanded and modernized it for generations to come.

Monongahela, PA · est. 1947

Monongahela is remembered as the oldest settlement in its valley, a river town whose life turned on the water from the very start. Devore's Ferry, chartered in 1775, made it a crossing and transportation hub long before the town was laid out in 1796 as Williamsport, and it became a city in 1873. From its banks countless pioneers pushed off to begin the river journey westward.

Monongahela, PA · est. 1947

Monongahela is remembered as the oldest settlement in its valley, a river town whose life turned on the water from the very start. Devore's Ferry, chartered in 1775, made it a crossing and transportation hub long before the town was laid out in 1796 as Williamsport, and it became a city in 1873. From its banks countless pioneers pushed off to begin the river journey westward.

Monongahela, PA · est. 1947

Monongahela is remembered as the oldest settlement in its valley, a river town whose life turned on the water from the very start. Devore's Ferry, chartered in 1775, made it a crossing and transportation hub long before the town was laid out in 1796 as Williamsport, and it became a city in 1873. From its banks countless pioneers pushed off to begin the river journey westward.

Jefferson, PA · est. 1960

In the years just after the Civil War, the Ten Mile Baptist Association set out to plant higher learning in the hills of southwestern Pennsylvania, founding what became the first Baptist college west of the Alleghenies in the state. Chartered by the legislature in 1871, Monongahela College opened its doors to students in a rural corner of Greene County, but like many small denominational schools of the era it struggled to stay solvent, closing, reopening, and finally shutting for good in 1894. Its brick 1871 college building still stands nearby as a reminder of that ambition.

Stroudsburg, PA · est. 1983

Monroe County was formed in 1836 from Northampton and Pike counties and named for President James Monroe. The land had earlier been a frontier battleground, marked by Indian raids between 1755 and 1782 and crossed by part of General Sullivan's 1779 march against the Iroquois. In later generations its Pocono Mountains blossomed into one of the Northeast's most famous resort regions.

Danville, PA · est. 1952

Built in 1792, this house was the residence of General William Montgomery, a pioneer settler on the Susquehanna frontier and father of the man who founded Danville. Solid and dignified, it stood as one of the early anchors of a community pushing into the Pennsylvania interior in the years after the Revolution. Today it shelters the Montour County Historical Society, which keeps the region's past alive within its walls.

Danville, PA · est. 1982

Carved from Columbia County in 1850, Montour County took its name from Madame Montour, the influential Native interpreter and diplomat who moved between Indigenous nations and colonial officials. In the industrial age its seat, Danville, became a cradle of American iron, where the first iron T-rails for the nation's booming railroads were manufactured. The county also claims Christopher Sholes, born here, whose later work produced the typewriter that transformed the modern office.

Philadelphia, PA

This monument enshrines the memory of the six million Jewish men, women, and children murdered in the Holocaust — in the ghettos, concentration camps, and gas chambers of Nazi-occupied Europe during the Second World War. Dedicated in Philadelphia, it was among the earliest public memorials in North America to the victims of the Holocaust. It stands as a permanent act of collective remembrance.

Carnegie, PA · est. 2004

In 1943, with the nation's factories running full-tilt for the war, the federal government threw up planned housing like Mooncrest to shelter the workers who kept the arsenal fed. Its residents crossed the river to the Dravo Corporation, turning out armor plate, munitions, and ships for the fight overseas. After the war the Air Force ran the community briefly before the little homes passed into private hands in the 1950s.

White Township, PA · est. 1951

Around 1781, in the final years of the Revolution, pioneer Fergus Morehead built a fortified refuge here to shelter his family and neighbors amid the violence of the western frontier. Fortified homesteads like this were the frontline of settlement in the Pennsylvania backcountry, where isolated families faced raids and had no army to protect them. Moorhead's Fort anchored what became the first permanent settlement in this part of Indiana County.