When did the City of Troy end?

Answer 1

There were many different cities built on the site of Troy. In each case, the city was built, then later destroyed or abandoned, then sometimes left unoccupied for a while, and then later re-built. The first known city of Troy was built about 3000 B.C. The one that's considered most likely to be the subject of the Iliad was destroyed by war and fire in 1260 B.C. The last Troy began its decline after the construction of Constantinople in the 4th century A.D.

Answer 2

It was destroyed by the Achaean (Greek) dipillaging expedition into Asia Minor in the 12th Century BCE.

Several successive cities were built on the site before and after that, being finally abandoned.

The Trojan War one was on level 7 of the ruins on the site. The final 9th level was built by August and lasted until the 4th Century CE, when its use as a trading base was superseded by Constantinople.