The mother Church of SS. Peter and Paul can be traced back to early Christian times. A letter written by Gregory the Great refers to the presence in the town of the Bishop of Paestum, and the name links it to the traditional belief that St. Paul landed in Agropoli, as well as to St. Peter who, like many of the inhabitants of the old town, was a fisherman. In the last two decades of the sixteenth century, the church was visited by bishops or their representatives, who were impressed by the high altar. This was restored in 1714 and 1875, with oil paintings of St. Anthony, between St. Bartholomew and St. Gaetano of Tiene.
The side chapels or altars are dedicated as follows: SS. Peter and Paul (1742); Christ Crucified (1905); the Immaculate Conception (1698 and 1875 - Troise family); Our lady of Arco (a district in Naples - 1875 - Vecchio family) with oil painting of the Madonna between St. Francis of Paola and St. Charles Borromeo; the Rosary (1742 - Confraternity) with painting of the Mysteries (1771), doorway to the street, three statues in niches of Our lady of Rosary between St. Lucia and St. Rosa (1875) and the old painting of Our lady of Mercy; St. Joseph (1742-1771 with St. Gennaro - Storti family) with painting of the Virgin between St. Joseph and St. Gennaro (1875 - Rosa family); St. Anthony of Padua (1583 - altar 1698, then 1875 altar from Magnoni and Del Baglivo families); St. Anthony the Abbot (1612,1875), with Rotoli family tomb, painting of St. Anthony the Abbot and small painting of the Holy Trinity.
The church has three bells (1583, 1714) of which the largest has been damaged, a clock (1698) and two doors (1698). restoration was necessary in 1612. In 1714, it was recorded that panes were missing from the "window of the main door". Inside there is one central nave, the chancel (1698), the pulpit (1698) and the confessionals. The churchyard had to be "walled in" at public expense in 1714.

(source: GuidAgropoli)