Operazione San Pietro, internationally released as Operation St. Peter's, is a 1967 Italian comedy film directed by Lucio Fulci.

He is sprung by accident when the Baron and his two incompetent cohorts, Agonia and the Captain, tunnel under his cell, having lost their way to an expected bank vault.

Meanwhile, Cajella encounters the beautiful Samantha while cruising for trade at a singles bar mainly populated by wealthy older women.

Elsewhere, the hungry gang attempts to raise money to buy food by offering American tourists a private view of Michaelangelo's Pieta.

Ventura and his men decide to head to Sicily with Vatican police and diverse cardinals, priests, and monks in hot pursuit.