45°47′46″N 8°23′59″E / 45.796191°N 8.399743°E San Giulio Island or St. Julius Island (Italian: Isola di San Giulio) is the only island within Lake Orta in Piedmont, northwestern Italy. The most famous building on the island is the Basilica di San Giulio close to which is the monumental old seminary (1840s). Since 1976 it has been transformed into a Benedictine monastery.