The picture dates itself to 280 BCE. The island of Rhodes is shown as an independent state, which is true enough for the time; however, it's alleged to have a king although Rhodes was a republic at the time. The king bears an uncharacteristic non-Greek name: Serse, an Italian corruption of Xerxes, a Greek corruption of an Iranian name that it scarcely resembles. The king receives an ambassador from Phoenicia - at the time an integral part of the Seleukid Empire (Syria). Greece is referred to as if a united country, which at the time was untrue - divided as it was between Attika, Lakaidemon, the Akhaian League, the Aitolian League, Epiros, Makedon, and other states.
In the film the Colossus of Rhodes is destroyed by a conveniently timed earthquake shortly after being completed. The real Colossus of Rhodes stood for over a half century before it was, like its cinematic counterpart, destroyed by an earthquake.