312

	312 by topic v • d • e
	Politics
	State leaders – Sovereign states
	Birth and death categories
	Births – Deaths
	Establishment and disestablishment categories
	Establishments – Disestablishments

Centuries:	3rd century · 4th century · 5th century
Decades:	280s 290s 300s 310s 320s 330s 340s
Years:	309 310 311 312 313 314 315

This article is about the year 312. For other uses, see 312 (disambiguation).

[edit] Events

October 28—Battle of Milvian Bridge: Constantine I defeats Maxentius and becomes the only Roman Emperor in the West. During the battle, he reportedly has a vision of a cross with the words in hoc signo vinces ("In this sign you shall conquer").
Construction begins on the Arch of Constantine in Rome.
c. 312–315 – Constantine Addresses the People in the Roman Forum, sculptural relief on the Arch of Constantine, Rome, is made.

The Council of Carthage supports Donatism, which espouses a rigorous application and interpretation of the sacraments. These doctrines will be condemned by the Council of Arles in 314.
Constantine promotes a policy of state sponsorship of Christianity, perhaps even becoming a Christian himself (see Constantine I and Christianity).

Centuries:	3rd century · 4th century · 5th century
Decades:	280s 290s 300s 310s 320s 330s 340s
Years:	309 310 311 312 313 314 315

312 by topic v • d • e
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishment and disestablishment categories
Establishments – Disestablishments