An ancient Christian basilica on the Caelian Hill in Rome that was built in AD 398 by will of a senator known as Pammachius. The basilica was located over the home of two Roman soldiers, John and Paul, who had been martyred under Julian in AD 362. The church was thus called the Titulus Pammachii.
Description via Pleiades. Coordinates and heritage data from the Atika atlas.
Atika pings you when you walk or drive past heritage like this. Works offline, no account needed to explore.