Anastasius, the name of four popes. I. Saint, occupied the Roman see 398-402. He was contemporary with Jerome, Chrysostom, and Augustine, and is remarkable for having condemned various axioms and writings of Ori-gen. Several letters by him are extant.

II. Saint, pope from 496 to 498. A letter from him to Clovis on his conversion and some fragments on the eastern schism are preserved.

III. From 911 to 913. His rule was gentle, but no details of his life are known.

IV. From July 9, 1153, to Dec. 2, 1154. He had previously been greatly distinguished as governor of Rome, and as pope favored the knights of St. John of Jerusalem.