San Giorgio Maggiore is one of the islands of Venice, northern Italy, lying east of the Giudecca and south of the main island group. The isle is surrounded by Canale della Grazia, Canale della Giudecca, Saint Mark Basin, Canale di San Marco and the southern lagoon. It forms part of the San Marco sestiere.
The island was probably occupied in the Roman period; after the foundation of Venice it was called Insula Memmia after the Memmo family who owned it. By 829 it had a church consecrated to St George; thus it was designated as San Giorgio Maggiore to be distinguished from San Giorgio in Alga.
The San Giorgio Monastery was established in 982, when the Benedictine monk, Giovanni Morosini, asked the doge Tribuno Memmo to donate the whole island for a monastery. Morosini drained the island's marshes next to the church to get the ground for building, and founded the Monastery of San Giorgio Maggiore, and became its first abbot.