Archangel Michael is considered the patron saint of the island of Thassos, and the nuns of this Greek monastery are the guardians of the shrine - the nail with which Jesus Christ was crucified. The monastery is small, built on the edge of a high cliff, above the Aegean Sea. The windows of the monastery are turned towards the holy Mount Athos, which is clearly visible in clear weather. It is believed that the monastery was founded in 830. Here, by the way, is one interesting local feature - when visiting monasteries and churches in Greece, women are asked to cover their shoulders and bare knees, and it is not recommended to cover their heads.→