Ancient sources do not agree on the details of how Perseus killed Medusa. Some accounts have him watching her reflection in a bronze shield to avoid her petrifying gaze, others describe a mirror-like device, and writers differ on whether it was Athena or Hermes who supplied his winged sandals, cap of invisibility and curved blade, with some giving him all three gifts from the nymphs instead. These are not late confusions but variations already present in the classical sources themselves, reflecting a myth that circulated in more than one regional telling before any version became standard. Perseus was also read historically by ancient writers rather than purely as fantasy.
Pausanias and other Greek authors treated him as a founding figure of Mycenae, crediting him with establishing the city, which gave the ruling dynasties of the Argolid a legendary ancestor and gave the myth a civic function beyond entertainment, anchoring a local aristocracy's claim to descent from a hero favoured by the gods. Reading the story this way, as later Greeks themselves sometimes did, treats Perseus less as a supernatural adventure and more as an origin account for a place and its ruling family, with the monster-slaying serving the same purpose a foundation charter would in a literate bureaucracy.