Saint Asterius of Ostia (d. 3rd century AD) was a martyred priest. Information on this saint is based on the apocryphal Acts of Saint Callixtus. According to tradition, he was a priest of Rome who recovered the body of Pope Callixtus I after it had been tossed into a well around 222 AD. Asterius buried Callixtus' body at night but was arrested for this action by the prefect Alexander and then killed by being thrown off a bridge into the Tiber River. According to tradition, his body washed up at Ostia and was buried there.