How many years ago did medusa live?

Medusa is a figure from Greek mythology, not a historical person, so she never lived in a specific time period. According to myth, she was one of the Gorgon sisters, and her story is set in the context of ancient Greek beliefs. The myths about Medusa were developed over centuries, with roots dating back to at least the 8th century BCE. Therefore, she exists in a mythological timeframe rather than a historical one.