Situated on the island of Saint Honorat off the coast of Cannes, the Notre Dame de Lérins Abbey is a Cistercian monastery.
The abbey was founded around 410AD when Saint Honorat came here with the intention of living as a hermit but was soon joined by his disciples. Together they formed a community that became “an immense monastery” around the year 427. According to legend, Saint Patrick, the patron saint of Ireland, studied here in the 5th century.
Today, open or guided tours are offered. The visitor can discover the fortified monastery with the main church dedicated to Saint Honorat in its centre and the Sainte-Marie church to the north. Also the 11th/12th century cloisters that border the common rooms such as the chapter room and refectory. The chapels, numbering seven, are distributed over the island. Finally, the hot shot furnaces remind us that the island and even the monastery had the role of defending the French coast.
http://www.avignon-et-provence.com/en/monuments/notre-dame-de-lerins-abbey