The Twenty-seventh Dynasty of Egypt (notated Dynasty 27), also known as the First Egyptian Satrapy, was effectively a province (satrapy) of the Achaemenid Persian Empire between 525 BC and 404 BC. It was founded by Cambyses II, the King of Persia, after his conquest of Egypt and subsequent crowning as Pharaoh of Egypt, and was disestablished upon the rebellion and crowning of Amyrtaeus as Pharaoh.

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