Peisistratus was ousted from political office and exiled twice during his reign. The first occurrence happened circa 555 B.C. after two political factions, normally at odds with each other, joined forces and removed him from power. He was exiled for several years, returned to power for a time, and then was exiled again. After ten years he returned in force, regained his tyranny, and held his power until his death in 527 B.C. Hippias succeeded his father in 527 BC, and with his brother Hipparchus, ruled jointly until the latter was murdered by Harmodius and Aristogeiton (the Tyrannicides) in 514 BC. Hippias executed the Tyrannicides and became a bitter and cruel ruler.
The exiled Alcmaeonid family helped to depose the Athenian tyranny for good by bribing the Delphic oracle to tell the Spartans to liberate Athens, which they did in 510 BC.