 It was declared a National Historic Landmark in 1970.Numerous dignitaries have visited Carpenters' Hall, including United States Supreme Court Chief Justice Warren Burger, King Carl XVI Gustaf and Queen Silvia of Sweden, President Václav Havel of the Czech Republic, President Guntis Ulmanis of Latvia, and Texas Governor (later U.S. President) George W. Bush with Pennsylvania governor Tom Ridge.Today, Carpenters' Hall is free to the public, visited annually by more than 150,000 tourists from around the world.