- The Sa... — Constantine

: He spent 18 years defeating rivals to become the sole ruler of the Roman Empire by 324 AD.

: Following his father’s death in 306 AD, his soldiers declared him emperor in Eboracum (modern York).

Constantine’s Conversion to Christianity - World History Encyclopedia Constantine - The Sa...

: Before the Battle of Milvian Bridge (312 AD), Constantine reportedly saw a cross in the sky with the words "In this sign, conquer" ( National Geographic ). Religious Revolution

: He commissioned the Church of the Holy Sepulchre in Jerusalem and the Old St. Peter’s Basilica in Rome. 🏗️ Lasting Reforms : He spent 18 years defeating rivals to

: Together with Licinius, he issued this proclamation to legalize Christianity and end state-sponsored persecution ( Lumen Learning ).

: He summoned the first ecumenical council to resolve theological disputes, which produced the Nicene Creed. Religious Revolution : He commissioned the Church of

Constantine the Great (c. 272–337 AD) was the first Roman emperor to convert to Christianity, a move that fundamentally shifted the course of Western history. 🏛️ Rise to Power