The William Penn Hotel has a ballroom on the 17 th floor, and it retains many of its original features. Archival footage helps tell the history of the hotel, and shows many celebrities who visited over the years. The Frick Bldg was built in 1901. Major landscaping in 1911 changed the city's urban form, affecting the lobby of the Frick Building. Current occupants of the Frick Bldg conduct a tour of some of the antiques that still exist from Henry Clay Frick's era, including a hand-built bank vault door that weighs more than fifteen tons.
Archival footage shows how the bldg used to be an open arcade.
Current occupants tell the story of a myth about secret chapels that exist in the Union Trust Bldg. The Koppers Bldg was built in the 1920's and is an example of Art Deco architecture. The bldg manager gives the history of the bldg's copper roof, which has oxidized and is now bright green. He also conducts a tour of some of the building's current mechanics. Built in 1932, the Gulf Bldg took over the title of the city's tallest building, a title it held for the next forty years.