Gondolin is a fictional city that had possible parallels to a city whose present-day location is known as what?
Gondolin: Gondolin is a fictional city in J. R. R. Tolkien's legendarium, inhabited by Elves. Gondolin:  It was the mightiest of the elven homes in the Hither Lands The city was famed for its walls, and had possible parallels to Troy Troy: Troy (Ancient Greek: Τροία , "Troia" and Ἴλιον , "Ilion", or Ἴλιος , "Ilios"; Latin: "Trōia" and "Īlium" ; Hittite: "Wilusha" or "Truwisha"; Turkish: "Truva or Troya" ) was a city situated in the far northwest of the region known in late Classical antiquity as Asia Minor, now known as Anatolia in modern Turkey, near (just south of) the southwest mouth of the Dardanelles strait and northwest of Mount Ida. Troy:  The present-day location is known as Hisarlik.
Hisarlik