Hall of the UrnsThe remains of various Roman emperors and their families are kept here - a function that the later Castel Sant'Angelo has fulfilled since ancient times.
PrisonOn the second level you can visit the prison cells and the yard, where executions were carried out.
Papal Apartment and TreasuryThe Papal Rooms where the popes lived are located on the 4th floor and are decorated with frescoes in the Mannerist style, as well as house paintings and sculptures. Here is also the treasury.
Museo di Castel Sant'AngeloThe museum in Castel Sant'Angelo is dedicated to the history of Hadrian's Mausoleum and Castel Sant'Angelo, as well as weaponry, interior decoration and everyday objects from different periods.