Around the same time, the state of Pennsylvania sought to divide up State House Square into smaller lots and sell them to developers to generate revenue—especially as the value of urban land had risen dramatically with population growth, says Tony Williams, a historian, educator and senior fellow at the Bill of Rights Institute. However, Philadelphia’s City Council convinced the state to preserve the square as an open and airy spot in an otherwise congested city.
In 1816, the state again floated the idea of selling State House Square. As part of the proposal, officials planned to add new roadways through the square to make the land more attractive to buyers—a change that would have required demolishing the State House.
Again, the City of Philadelphia challenged the state’s intent to sell State House Square and its buildings for two reasons. “One was a property rights issue: Why should the City give up valuable land to the State?,” Diethorn says. “The other reason was the State House’s historical significance.” Many prominent Philadelphians and local newspapers urged its preservation for its civic purpose and historical value, Williams says.
So the city of Philadelphia passed an ordinance authorizing the purchase of State House Square, the Pennsylvania State House and the four buildings on either side from the Commonwealth of Pennsylvania. Two years later, in 1818, the transfer of ownership took place, and the city has owned the property ever since.
Today, the site is part of Independence National Historical Park, which Congress established in 1948 and the National Park Service administers under an agreement with the city.
How Pennsylvania State House Became Independence Hall
In 1824, the elderly Marquis de Lafayette returned to the United States on a farewell tour of the nation he had fought for as a young man during the American Revolution. Cities and towns across the country organized celebrations in his honor. Philadelphia marked the occasion with an elaborate parade that led Lafayette to the Pennsylvania State House for a public ceremony.
By that time, people had begun referring to the Assembly Room as the “Hall of Independence.” The welcome ceremony for Lafayette was held in the same room, further cementing its connection with the Declaration of Independence and the nation’s fight for independence.
“By the early 1830s, the term ‘Hall of Independence’ was often used to refer to the entire State House,” Diethorn says. “Eventually, the name ‘Independence Hall’ completely replaced the State House’s original name.”
When Was Independence Hall Opened to the Public?
During the early 19th century, people visited Independence Hall to see Charles Willson Peale’s museum of natural history, curiosities and art on the building’s second floor. By the 1840s, Peale’s Museum had been replaced by municipal offices.
In 1854, the Assembly Room was renovated and decorated with historical paintings and period furniture as a public attraction celebrating the American Revolution, often referred to as the “National Museum.” For the nation’s centennial in 1876, the remaining first-floor rooms of Independence Hall were incorporated into the museum. It wasn’t until Philadelphia’s municipal offices relocated to the new City Hall in 1898, however, that the entire building became a historical museum, according to Diethorn.
Congress returned to Independence Hall for a ceremonial session in 1976 to commemorate the country’s bicentennial. It will host lawmakers once more on July 2, 2026.