Kastellorizo or Castellorizo (Greek: καστελλόριζο - Kastellorizo, officially μεγίστη - Megisti megísti Or) meyisti meyísti Is a greek island and municipality located in The. southeastern mediterraneann the late 1920s the population of the island had dropped to 3,000, while about 8,000 inhabitants lived abroad, predominantly in Australia, Egypt, Greece and the U.S. At that time the town had 730 inhabited houses, while 675 were already empty, and many ruined.