Like its 2nd-century model, the library is a round building fronted by a large two-storey portico which forms the main entrance on St Peter's Square, and is surrounded by five bays of Corinthian columns.
The library is a round building-storey portico. This was like its 2nd-century model. This round building is fronted by a large two-storey portico. This storey portico forms the main entrance on St Peter's Square. This storey portico is surrounded by five bays of Corinthian columns.