A temple to Sol Invictus is dedicated in Rome by Emperor Aurelian.
Temple of the Sun (Rome)
The Temple of the Sun was a temple in the Campus Agrippae in Rome. It was dedicated to Sol Invictus on 25 December 274 by the emperor Aurelian to fulfill a vow he made following his successful campaign against Palmyra in 272 and funded by spoils from that campaign. A college of pontifices (Dei) Solis and annual games with circus races was established for the cult, as well as four-year games to be held at the end of the Saturnalia.
Sol Invictus
Sol Invictus was the official sun god of the late Roman Empire and a later aspect of, or replacement for, the old Latin god Sol. The emperor Aurelian revived his cult in 274 AD and promoted Sol Invictus as the chief god of the empire. From Aurelian onward, Sol Invictus often appeared on imperial coinage, usually shown wearing a sun crown and driving a horse-drawn chariot through the sky. His prominence lasted until the emperor Constantine I legalized Christianity and restricted paganism. The last known inscription referring to Sol Invictus dates to AD 387, although there were enough devotees in the fifth century that the Christian theologian Augustine found it necessary to preach against them.