This little church between Via della Magliana and the river Tevere (Tiber), Rome is consecrated to Saint Passera, a Saint who has never existed in the history of Christianity. 
This name comes probably from the modification of the name Abbàs Cyrus (father Ciro), then Abbaciro, Appaciro, Appacero, Pacero, Pacera.
This church was built in the II Century A.D. and has undergone many changes, which were studied by analyzing its several stoneworks and by reading many books and supporting materials.