Pausanias Description of Greece 2.25.8

[8] Going on from here and turning to the right, you come to the ruins of Tiryns . The Tirynthians also were removed by the Argives, who wished to make Argos more powerful by adding to the population. The hero Tiryns , from whom the city derived its name, is said to have been a son of Argus, a son of Zeus. The wall, which is the only part of the ruins still remaining, is a work of the Cyclopes made of unwrought stones, each stone being so big that a pair of mules could not move the smallest from its place to the slightest degree. Long ago small stones were so inserted that each of them binds the large blocks firmly together.

[8] Going on from here and turning to the right, you come to the ruins of Tiryns. The Tirynthians also were removed by the Argives, who wished to make Argos more powerful by adding to the population. The hero Tiryns, from whom the city derived its name, is said to have been a son of Argos, a son of Zeus. The wall, which is the only part of the ruins still remaining, is a work of the Cyclopes made of unfinished stones, each stone being so big that a pair of mules could not move the smallest from its place to the slightest degree. Long ago small stones were so inserted that each of them binds the large blocks firmly together.