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Washington Square (Originally designated in 1682 as Southeast Square) is a 6.4 acres (2.6 ha) Open-space park in Center City, Philadelphia, The southeast quadrant and one of the five original planned squares laid out on the city grid by William Penn's surveyor, Thomas Holme. It is part of both the Washington Square West and Society Hill neighborhoods.

The Tomb of the Unknown Revolutionary War Soldier, also known as the Tomb of the Unknown Soldier of the American Revolution, is a war memorial located within Washington Square in Philadelphia, Pennsylvania. The memorial honors the thousands of soldiers who died during the American Revolutionary War, many of whom were buried in mass graves in the square.

The Athenaeum of Philadelphia, located at 219 S. 6th Street between St. James Place and Locust Street in the Society Hill neighborhood of Philadelphia, Pennsylvania, is a special collections library and museum founded in 1814 to collect materials "connected with the history and antiquities of America, and the useful arts, and generally to disseminate useful knowledge" for public benefit.

The South Philadelphia Athenaeum was one of the most important not-for-profit venues in Philadelphia during its existence, an open forum where events ranging from weekly philosophy and mathematics lectures, to fashion, art, game, puppet, magic, comedy and musical shows would be free to the public. It operated from circa spring 2004 to September 24, 2005."The Anthenaeum", more commonly called the "Juniper Warehouse", is associated with other members of Philadelphia's independent art scene including Space 1026, Vox Populi, The Fabric Workshop and Museum and Black Floor Gallery.