Troy

Troy was a city located in the far west of ancient Anatolia, later Turkey. It was the site of the Trojan War, fought between the Greeks and Trojans circa 1200 BCE. The Doctor, Steven Taylor and Vicki visited Troy at the end of the war, and were partly responsible for the events leading up to the Greek victory. Here they met Katarina, who left in the TARDIS with the Doctor and an injured Steven, while Vicki stayed behind the young Trojan Troilus, with whom she had fallen in love. (DW: The Myth Makers)

The Rani had also visited Troy during the war. (DW: The Mark of the Rani)

The Fourth Doctor claimed nt ot have come up with the idea of the Trojan Horse, and yet it was the First Doctor in The Myth Makers who gave the Greeks this idea into invading Troy., (DW: Underworld)