Loreto (/ləˈrɛtoʊ/ lə-RET-oh,[3] US also /ləˈreɪtoʊ/ lə-RAY-toh,[4] Italian: [loˈreːto]) is a hill town and comune of the Italian province of Ancona, in the Marche. It is most commonly known as the seat of the Basilica della Santa Casa, a popular Catholic pilgrimage site.