Editing 400 BC (section)

=== By topic ===
* The [[catapult]] is invented by [[Ancient Greece|Greek]] engineers.{{citation needed|date=March 2024}}
* The Mature classical period of [[sculpture]] ends in [[Ancient Greece]] and is succeeded by the fourth-century ([[Late Classical]]) period (approximate date).{{citation needed|date=March 2024}}
* A model of the [[Acropolis]] of [[Athens]] is made. It is now kept at the [[Royal Ontario Museum]] in [[Toronto]], [[Ontario]], Canada (approximate date).{{citation needed|date=March 2024}}
* Theodorus from [[Phokaia]] in [[Asia Minor]], builds the [[Tholos of Delphi]], the sanctuary of Athena Pronaia in [[Delphi]] (approximate date).{{citation needed|date=March 2024}}
* [[Dionysius I of Syracuse|Dionysius I]], Greek tyrant of [[Syracuse, Sicily|Syracuse]], confiscates gold and silver [[coin]]s and re-mints them, keeping the weight the same but changing the [[Denomination (currency)|denomination]] from one to two [[Ancient drachma|drachmae]] — the first known official [[devaluation]] at the expense of the general population. A virulent [[inflation]] ensues (approximate date).{{citation needed|date=March 2024}}
* [[Zoroastrianism]] becomes the faith of many Persians. The Zoroastrians believe in a struggle between their god, [[Ahura Mazda|Mazda]], and the devil. They believe that the birth of their founder, the prophet [[Zoroaster|Zarathustra]], was the beginning of a final [[Epoch (reference date)|epoch]] that is to end in an [[Armageddon]] and triumph of good and evil.{{citation needed|date=March 2024}}
* [[Vedic Brahmanism|Brahmanism]] starts evolving in [[Hinduism]], a process which takes place over the following [[200 BC|200 years]] (approximate date).{{citation needed|date=March 2024}}
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