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Early RepublicReconstruction & Gilded Age

Moyamensing Prison

Philadelphia, Philadelphia County, Pennsylvania

Marker Inscription

Opened in 1835, Thomas U. Walter designed it with elements of Egyptian Revival style and following the revolutionary principle of isolated confinement. With later additions, it could house nearly 5000 inmates - African Americans and women in separate wings. H. H. Holmes, considered Americas first serial killer, was executed here. The last hanging in Pa. took place here in 1916, soon replaced by electrocution. Closed in 1963, it was razed in 1968.

Erected by Pennsylvania Historical and Museum Commission

The Story

When Moyamensing Prison opened in 1835, it embodied a wave of American penal reform that gripped Philadelphia in the early republic — the belief that isolating inmates could reform them. Designed by Thomas U. Walter, later architect of the U.S. Capitol dome, its striking Egyptian Revival lines housed thousands, with African Americans and women confined in separate wings. Over its long life it saw notorious moments, including the execution of H. H. Holmes and Pennsylvania's last hanging in 1916, before closing in 1963 and being demolished five years later.

Why it matters

The prison stands as a landmark in the American experiment with incarceration and reform, reflecting both the era's high ideals about rehabilitation and the hard realities of race, gender, and punishment.

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Related people

  • · Thomas U. Walter
  • · H. H. Holmes

Themes & tags

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