Sol Invictus

Sol Invictus, meaning "Unconquered Sun," was a late Roman sun god whose worship was officially promoted by Emperor Aurelian in 274 CE. The deity symbolized the sun's eternal power and vitality. The cult of Sol Invictus aimed to unify the empire's diverse religious practices under a common celestial figure, emphasizing strength, resilience, and continuity. The festival of Dies Natalis Solis Invicti, celebrating the "Birthday of the Unconquered Sun," was held on December 25, aligning with winter solstice celebrations and influencing later Christian holiday practices.