The catacombs are located near the village of Tripiti, in caves 150 meters above sea level. In 2009 the Holy Synod declared Milos a sacred island, since the Catacombs represent the earliest monument of Christendom. It was the first place of worship of the first Christians as well as the location of the first community cemetery in the late 2nd century. The Catacombs of Milos are unique in size throughout Greece and one of the most famous and remarkable Christian monuments in the world, alongside the catacombs of Rome and the Holy Land. Visiting hours: Daily 8:30-18:30, Sunday 8:30-15:00. Closed Monday.