why bother to get the facts right?
It has already been pointed out to Luciemanet that Theseus and his band are Greeks, not Romans. Theseus was the son of Athenian king Aegeos who killed the Minotauros in Knossos, Crete. Another comment asks why there are axes everywhere on the Amazon decor. Firstly, the labrys was the sacred weapon of the Amazons, and it also makes for a nice symmetry with the fact that this same kind of axe was typical of the Minoan kingdom.
That being said, why bother? The film is totally inaccurate, I will not say historically, as the characters are not historical, but mythologically. The saga of Theseus and the Amazon queen (whose name was Hyppolyta)is totally different from the one shown in the movie. But I don't think that was of any concern to the makers. Nor to the viewers who came to see nude wrestling, not a history lesson.