Editing 6th century BC (section)

=== [[520s BC]] ===
[[File:Astasahasrika Prajnaparamita Victory Over Mara.jpeg|thumb|150px|upright|[[Gautama Buddha]]]]
* [[528 BC]]: [[Gautama Buddha]] attains [[Enlightenment (Buddhism)|Enlightenment]], and begins his ministry. He founds [[Buddhism]] in [[India]]. It becomes a major [[world religion]].
* [[526 BC]]: [[Psammetichus III]] succeeds [[Amasis II]] as [[King]] of [[Ancient Egypt|Egypt]].
* [[525 BC]]: [[Cambyses II]], ruler of [[Iran|Persia]], conquers [[History of ancient Egypt|Egypt]], defeating [[Psammetichus III]]. This is considered the end of the [[Twenty-sixth Dynasty of Egypt|Twenty-sixth Dynasty]], and the start of the [[Twenty-seventh Dynasty of Egypt|Twenty-seventh Dynasty]].
* [[522 BC]]: [[Smerdis of Persia|Smerdis]] succeeds [[Cambyses II]] as ruler of [[Iran|Persia]].
* [[522 BC]]: [[Babylon]] rebels against [[Achaemenid Empire|Persian]] rule.
* [[521 BC]]: [[Darius I]] succeeds [[Smerdis]] as ruler of [[Iran|Persia]].
* [[521 BC]]: The [[Babylonia]]n rebellion against [[Achaemenid Empire|Persian]] rule is suppressed
* [[520 BC]]: [[King Dao of Zhou]] becomes king of the [[Zhou dynasty]] of [[China]] but dies before the end of the year
* [[520 BC]]: Start of construction of a colossal new [[Temple of Olympian Zeus (Athens)]] by [[Pisistratus]]'s sons, [[Hippias (tyrant)|Hippias]] and [[Hipparchus (brother of Hippias)|Hipparchos]] (approximate date).
* [[520 BC]]: [[Cleomenes I]] succeeds [[Anaxandridas II]] as [[King of Sparta]] (approximate date)