Tiryns was a hill fort with occupation ranging back seven thousand years, from before the beginning of the Bronze Age. It reached its height between 1400 and 1200 BC, when it was one of the most important centers of the Mycenaean world, and in particular in Argolis. Its most notable features were its palace, its Cyclopean tunnels and especially its walls, which gave the city its Homeric epithet of "mighty walled Tiryns". Tiryns is linked with the myths surrounding Heracles, as the city was the residence of the hero during his labors, and some sources even cite it as his birthplace.