The Monastery of Arkádi (GR:Αρκάδι) built during the last Venetian period, it consists of a large set of fortress-like buildings. The main building included the cells, the warehouses where the agricultural products were treated and stored, the stables. In a word, it was a well-equipped little fortress where people could find refuge in times of trouble. There is an impressive church, with two naves dedicated to Saint Constantine and Saint Helen, and to Our Lord. Due to the holocaust it suffered in 1866, Arkadi has become the island's most famous monastery.