Travelers passing through the neighborhood might notice a small church with a long history. This is Santa Passera, a place believed to hold the tombs of Saints Ciro and Giovanni, who were killed during the reign of Emperor Diocletian.
The church’s unusual name has changed over the centuries. It started as Abba Cyrus, slowly shifted through Appaciro, then Appacero, and eventually became Pacera—very close to the modern Passera. This evolution reflects the local language and history woven into the building’s identity.
The church stands on top of an ancient structure from the third century. Visitors can still see parts of this original building on the lower floor and in the underground areas. Most of the visible church today was built in the 9th century. On the upper floor, there are old frescoes, some of which have been carefully restored to show their original colors.
Downstairs, a small square room leads further down to the underground crypt. According to tradition, this is where the remains of the two saints are kept. On the lower levels, some parts still show rare Roman frescoes from the third century. In front of the staircase, there are paintings of a small bird called the Justice and an athlete. Look up at the vaulted ceiling to spot eight-pointed stars, a detail preserved from ancient times.
Santa Passera is easy to reach by public transportation. Buses 128, 780, 781, and 775 all stop nearby, with the first stop at Via della Magliana.
Source - https://en.wikipedia.org/wiki/Santa_Passera