Palace of the Grand Master of the Knights of Rhodes

The Palace of the Grand Master of the Knights of Rhodes, also known as the Kastello , is a medieval castle in the city of Rhodes, on the island of Rhodes in Greece.
According to recent study, in the exact spot in which the palace exists today, there was the foundations of the ancient temple of the Sun-god 'Helios' and probably that was the spot where Colossus of Rhodes stood in the Antiquity. The palace was originally built in the late 7th century as a Byzantine citadel. After the Knights Hospitaller occupied Rhodes and some other Greek islands (such as Kalymnos and Kastellorizo) in 1309, they converted the fortress into their administrative centre and the palace of their Grand Master. In the first quarter of the 14th century, they repaired the palace and made a number of major modifications.The palace was damaged in the earthquake of 1481, and it was repaired soon afterwards.
Wikipedia