The patron saint of Mentana is Saint Nicholas of Bari, celebrated on 6 December.
The municipal territory holds the church of Santa Maria degli Angeli in Mentana, the Castello di Greppe and the Roman Cistern, testimony to the area's ancient past. The town also hosts the National Museum of the Roman Countryside Campaign for the Liberation of Rome and the MuCaM, the Civic Archaeological Museum of Mentana and the Nomentan Countryside.
