Cavalier d\Arpino no relation Giacomo della Porta
Architecture
The main layout was designed by Giacomo della Porta, although the facade was attributed to Martino Longhi the Elder. The facade is placed between two towers covered with domes, which is divided into two horizontal bands by a marble ledge. Either side of a large window is written an inscription, one in Greek and the other in Latin in honor of Saint Athanasius of Alexandria. On the left stands a tower clock, donated by Pope Clement XIV in 1771, which faces the palace of the Pontifical Greek College.
The interior was frescoed by Francesco Tibaldi, and contained altarpieces by Cavalier d'Arpino. In the past, the library was said to hold the library of Leo Allatius.