Pope Saint Anastasius I was born with the given name of Anastasius in the year A.D., and died in 401 A.D. He began his reign as Pope in the year 399 A.D. and ended his reign in the year 401 A.D., during the Late Antiquity. Saint Anastasius I was from Rome, and his papal number is: 39 out of 267 officially recognized Roman Catholic Popes.

Summary: Pope remembered for doctrinal vigilance and moral seriousness.

Saint Anastasius I served briefly but earned a reputation for theological seriousness during a period of growing concern about heterodox teachings. He is particularly associated with opposition to certain speculative writings linked to Origenism, reflecting the Church’s desire to preserve doctrinal purity without surrendering intellectual depth.

Anastasius also represented the moral tone expected of the Roman see: sobriety, reverence, and pastoral caution. In the memory of later generations, he appears as a pope of gravity and integrity, attentive to both doctrine and ecclesiastical character.

Though his reign was short, it contributed to the Roman Church’s reputation for watchfulness in matters of faith.