Alatri Cathedral, otherwise the Basilica of Saint Paul (Italian: Duomo di Alatri; Basilica concattedrale di San Paolo apostolo), is a Roman Catholic cathedral in Alatri, Lazio, Italy, dedicated to Saint Paul. It was formerly the cathedral of the Diocese of Alatri. Since 30 September 1986 it has been a co-cathedral of the Diocese of Anagni-Alatri.