HistoricSiteMarkers
Early Republic

Southwest No. 4 Boundary Marker of the Original District of Columbia

Alexandria, Alexandria, Virginia

Marker Inscription

Original Federal Boundary Stone District of Columbia Placed 1791-1792 Protected by Continental Chapter Daughters of the American Revolution 1916

The Story

In 1791, as the brand-new United States laid out a federal capital on the Potomac, surveyors set about marking the ten-mile-square diamond that would become the District of Columbia. A team led by Andrew Ellicott, aided by the free Black astronomer Benjamin Banneker, placed sandstone markers at one-mile intervals around the perimeter — the first federal monuments of the new nation. This stone, one of the original boundary markers on the Virginia side, was later given protective care by the Daughters of the American Revolution in 1916.

Why it matters

These boundary stones are among the oldest federal monuments in the country, physically defining the seat of the new republic's government and standing as tangible relics of the founding era's grand experiment in creating a capital city from scratch.

The story behind this marker

AI context

The era

In the early 1790s, the United States was barely a country at all — a loose, hopeful republic still figuring out what it wanted to be. One of the first big decisions was where to put the seat of government. After much negotiation, the new nation chose a stretch of land along the Potomac River, a compromise spot between the commercial North and the agricultural South.

The plan was bold and almost absurdly precise: a perfect diamond, ten miles on each side, carved out of land donated by Virginia and Maryland. Within that geometric shape, a brand-new capital city would rise from farm fields and woods. Nothing like it had ever been attempted in America.

Before any grand avenues or marble buildings could exist, someone had to draw the lines. That meant surveyors trudging through forests and across creeks in 1791 and 1792, dragging chains and sighting stars, turning an idea on paper into something you could actually stand on. Alexandria, where this stone sits, fell inside that original diamond on the Virginia side of the river.

People & events

The survey was led by Andrew Ellicott, a respected surveyor charged with the painstaking work of measuring and marking the boundary. It was exacting, exhausting labor — long days outdoors, careful astronomical observations to keep the lines true, and the placing of stone markers at one-mile intervals all the way around the perimeter.

Working alongside Ellicott in the early stages was Benjamin Banneker, a free Black astronomer and mathematician, who helped with the celestial observations that kept the survey accurate. That a self-taught Black man played a role in laying out the capital of a young nation still wrestling with slavery is one of the quietly remarkable facts of this story — a detail worth pausing over.

More than a century later, in 1916, the Daughters of the American Revolution recognized that these humble stones were national treasures hiding in plain sight. The Continental Chapter took on the task of protecting this marker, helping ensure that a piece of the founding era survived into the modern age rather than crumbling away unnoticed at the edge of a road.

Its place in the American story

These boundary stones are among the very first federal monuments in the United States — older than the Capitol dome, older than the Washington Monument, older than almost anything we associate with the city they helped define. They didn't commemorate the government; they physically created the space where it would live.

Each stone marks the literal edge of a grand experiment: the deliberate design of a capital city from nothing, on land set aside for the purpose. Most nations grew their capitals over centuries. The United States simply decided where its own would be and went out to measure it, mile by mile.

To stand beside one of these stones is to touch the founding generation's confidence — and its faith in straight lines, careful math, and the idea that a republic could build itself a home. The stones outlasted the original boundaries themselves; the Virginia portion of the diamond was eventually returned to the state, but the markers remained, quiet witnesses to where the lines once ran.

If you visit

Don't expect a towering monument. What you're looking for is modest — an old sandstone marker, small and weathered, often tucked behind a protective cage or fence put up to guard it from the centuries. That plainness is the point. These stones were working tools, not showpieces, and their survival is something close to a small miracle.

Take a moment to read the worn lettering and remember what you're seeing: one of the original corner-to-corner markers of the District of Columbia, set in place by surveyors more than two hundred years ago. The land around it has changed beyond recognition, but the stone has stayed put.

If you're road-tripping through Alexandria, this makes a wonderful offbeat stop — a reminder that history isn't only in grand buildings but sometimes underfoot, at the edge of an ordinary street. Pair it with a stroll through Alexandria's historic Old Town, and you'll feel how close the early republic still is. Treat the stone gently, and let it do what it's done for two centuries: quietly mark the spot where a nation drew its first lines.

Written by AI to add context, grounded in the marker’s inscription and the historical record. The inscription above is the original, unaltered text.

Plan your visit

Nearby

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Museums & culture

Attractions

Food & drink

  • &pizza
    0.1 mi away · 3690 King Street, Alexandria, VA
  • Starbucks
    0.1 mi away · 3690 Q King Street, Alexandria, VA
  • Kyoto Sushi
    0.2 mi away · 3676 King Street, Alexandria, VA
  • Subway
    0.2 mi away · 3674 King Street, Alexandria, VA
  • California Tortilla
    0.2 mi away · 3672 King Street, Alexandria, VA
  • McDonald's
    0.2 mi away · 3646 King Street, Alexandria, VA

Places to stay

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Related people

  • · Andrew Ellicott
  • · Benjamin Banneker
  • · Daughters of the American Revolution

Related events

  • · Survey of the District of Columbia boundary (1791-1792)

Themes & tags

Westward ExpansionInnovation & FlightMonument

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