According to reports, the 48-year-old Catholic priest apparently organized the orgies on the premises of San Lorenzo church, where he is based.
It is claimed that he concealed the home-made porn films in covers bearing the names of popes.
It has also been suggested that Fr Contin “farmed out” some of his lovers on wife-swapping websites and took female friends to stay at a naturist and swingers’ resort in Cap d’Agde on the southern French coast.
Complaints were reportedly first made to the local bishop last summer but church authorities did not inform police, saying they had not yet completed their own investigation.
One unnamed 49-year-old church volunteer, who claims she had an affair with Fr Contin and had sex with him on church premises, told Il Mattino di Padova: “There were a lot of women hovering around him. I didn’t understand that at first, only later.”
Fr Contin has not been arrested but a prosecutor is apparently investigating the allegations.