Five Kastelia were built in Santorini during the Venetian period. Castle-states that protected the inhabitants of the island from pirate raids. The castles of Santorini were located in Skaros Imerovigliou, Pyrgos, Emporio, Akrotiri and Oia. Today, the most well-preserved are those of Emporio and Pyrgos, in Akrotiri, which dominates among the newly built traditional houses, creating a unique picturesque landscape, while the ruins of the Castle of Oia are the most famous spot on the island to enjoy. the sunset.