Santa Maria Maggiore (Italian pronunciation: [ˈsanta maˈriːa madˈdʒoːre]), also known as the Basilica of Saint Mary Major or the Basilica of Saint Mary the Great, is one of the four major papal basilicas and one of the Seven Pilgrim Churches of Rome. The largest Marian church in Rome, it is regarded as the first Marian sanctuary in the Western world and the mother of all sanctuaries.
Santa Maria Maggiore is located in Esquilino, the 15th rione (administrative district) of Rome, on the Piazza dell'Esquilino. Pursuant to the Lateran Treaty of 1929 between the Holy See and Italy, the basilica is in Italy and not Vatican City. However, as a property of the Holy See, Italy is obliged to protect its ownership and to concede to it "the immunity granted by international law to the headquarters of the diplomatic agents of foreign states". The complex of buildings therefore has a status somewhat similar to an embassy.