Arkhangelos

Greece / Dodekanisos / Arkhangelos /
After the fall of Constantinople in 1453, the Knights Hospitaller who were occupying the island of Rhodes since 1309, built a fortress (some sort of an Acropolis) on top of one of the town's nearby hills to protect from a possible Ottoman invasion on the island. Ruins of this (castle of Saint John) fortress remain today.
Wikipedia article: https://en.wikipedia.org/wiki/Archangelos,_Rhodes
Nearby cities:
Coordinates:   36°12'53"N   28°6'55"E