There is a Benedictine monastery with the Church of Saint Mary on the Isle of Saint Mary situated in the southern part of the Great Lake. The area of the isle is 1.2 acres (0.5 hectares). The monastery was being built from 1177 to 1198. During centuries, the church changed its appearance under the influence of different styles, the Renaissance and Baroque, but the central part remained Romanesque. The Church of Saint Mary as part of the monastery compound is a single nave Romanesque (Apulian) construction, built after the original Benedictine’s building in Monte Gargano.
