Pausanias Description of Greece 8.36.5

[5]
  Passing through the gate at Megalopolis named the Gate to the Marsh, and proceeding by the side of the river Helisson towards Maenalus, there stands on the left of the road a temple of the Good God. If the gods are givers of good things to men, and if Zeus is supreme among gods, it would be consistent to infer that this surname is that of Zeus. A short distance farther on is a mound of earth which is the grave of Aristodemus, whom in spite of his being a tyrant they could not help calling the Good and there is also a sanctuary of Athena surnamed Contriver, because the goddess is the inventor of plans and devices of all sorts.

[5] Passing through the gate at Megalopolis named the Gate to the Marsh, and proceeding by the side of the river Helisson towards Mainalos, there stands on the left of the road a temple of the Good God. If the gods are givers of good things to men, and if Zeus is supreme among gods, it would be consistent to infer that this surname is that of Zeus. A short distance farther on is a mound of earth which is the tomb of Aristodemos, whom in spite of his being a tyrant they could not help calling the Good and there is also a sanctuary of Athena surnamed Contriver, because the goddess is the inventor of plans and devices of all sorts.