The Papal Basilica of Saint Lawrence outside the Walls (Italian: Basilica Papale di San Lorenzo fuori le Mura) is a Roman Catholic parish church and minor basilica, located in Rome, Italy. The basilica is one of the Seven Pilgrim Churches of Rome and one of the five Patriarchal basilicas, each of which is assigned to a patriarchate. St. Lawrence outside the Walls is assigned to the Patriarchate of Jerusalem.

The papal basilica is the shrine tomb of the church's namesake, Saint Lawrence, one of the first seven deacons of Rome martyred in 258. Pope Pius IX, awaiting canonization into sainthood, is also buried at the basilica.