The state Capitol was architecturally inspired by St. Peter's Basilica in Rome, and many consider it the pinnacle of the Commonwealth as the finest state capitol building in the United States. The brilliantly restored rotunda and Senate and House of Representatives Chambers are particularly exquisite spaces adorned with marble, murals, gold leaf and stained glass.
In Huston's original concept of the Capitol, he strove to unite architecture, sculpture and painting into an interpretation of Pennsylvania's rich southeast. Artists with work in or on the building include sculptors George Grey Barnard and Roland Hinton Perry, and muralists Violet Oakley and Edwin Austin Abbey. - from wikipedia