Perseus translated the seat of his kingdom from Argos to Mycenæ. The kings who reigned at Mycenæ, after Perseus, were Erectryon, Sthenelus, and Eurystheus. The last, after the death of Hercules, declared open war against his descendants, apprehending they might some time or other attempt to dethrone him; which, as it happened, was done by the Heraclidæ; for, having killed Eurystheus in battle, they entered victorious into Peloponnesus; and made themselves masters of the country. But a plague obliged them to quit the country. Three years after this, being deceived by the ambiguous expression of the oracle, they made a second attempt, which likewise proved fruitless. This was about twenty years before the taking of Troy. Atreus, the son of Pelops, uncle by the mother’s side to Eurystheus, was the latter’s successor. And in this manner the crown came to the descendants of Pelops, from whom Peloponnesus, which before was called Apia, derived its name. The bloody hatred of the two brothers, Atreus and Thyestes, is known to all the world. Plisthenes, the son of Atreus, succeeded his father in the kingdom of Mycenæ, which he left to his son Agamemnon, who was succeeded by his son Orestes. The kingdom of Mycenæ was filled with enormous and horrible crimes, from the time it came into the family of Pelops. Tisamenes and Penthilus, sons of Orestes, reigned after their father, and were at last driven out by the Heraclidæ. The length of the Acropolis of Mycenæ, is about four hundred yards,[5] and its breadth about two hundred. The whole circuit of this citadel can still be made out; and, in some places, the walls remain to the height of fifteen or twenty feet. They are constructed of huge stones, and belong to that style of building commonly called Cyclopean. This description of wall building is recognised by its massy materials, and by a certain style of rudeness; in which, however, different epochs are easily distinguished. The oldest part of the walls of Mycenæ, resembles the Cyclopean walls of Tiryns, a place to the south, about seven miles distant, which are apparently nothing more than huge masses of unwrought stone, placed one above another, with the interstices filled up by smaller materials.