The Domus Marmeniae is a villa located on the Via Appia near the fourth milestone. The villa grounds hosted a pagan necropolis and tradition holds that the matrona, Marmenia, relocated the body of St. Urban to a mausoleum built on the grounds.
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.