The first archaeologist to excavate the remains of the catacomb was Orazio Marucchi (1852–1931): in 1878, while searching for the cemetery, he casually entered a cellar, at the foot of the Parioli hills, and he realized that it actually was a grave covered with pictures, though very ruined because of its change into a room for agricultural use.
Nowadays hardly anything remains of the catacomb, especially due to the flood and the landslip that involved the area in 1986 and that made most of the galleries inaccessible.
There are also remains of an underlying crypt – probably due to the works carried out by Pope Leo III (8th–9th century) – covered in marbles, some fragments of which are still in loco.
The only significant room of the catacomb, and also the only that can be visited today, is the ambulatory discovered by Marucchi in the 19th century and converted into a cellar.
This room was visited by Antonio Bosio and at that time it was still intact: therefore, thanks to the drawings that he commissioned, it is possible to decipher the remains of the frescoes still surviving.