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Events

By Topic

Roman Empire

• March 7 - Edict of Constantine I, which sets the dies Solis Invicti (Sunday) as the day of rest: trade is forbidden; agriculture is allowed.

By Topic

Arts and Sciences

• Calcidius translates Plato into Latin.

Religion

• The Roman Catholic church is allowed to hold property.
• A synod in Alexandria condemns Arianism.

Births

• Valentinian I, Roman emperor

Deaths

• af:321

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