Background
He was the son of Titus Flavius Sabinus, consul in AD 52 and praefectus urbi during the reign of Nero, and a brother of Titus Flavius Sabinus, consul in AD 82. His father was captured and slain by the forces of Vitellius, who burnt the capitol, but the rest of the family escaped.
Career
Titus Flavius T. f. T. n. They had two sons, whom Domitian intended to succeed him in the empire, renaming one of them Vespasian and the other Domitian. This may imply that Clemens had become a Christian.
To this Clemens in all probability is dedicated the church of Saint Clement at Rome, on the Caelian hill, which is believed to have been built originally in the fifth century, although its site is now occupied by a more recent, though very ancient, structure.
In the year 1725 Cardinal Annibal Albani found under this church an inscription in honour of Flavius Clemens, martyr, which is described in a work called T. Flavii Clementis Viri Consularis et Martyris Tumulus illustratis. Some connect Clemens with Clemens Romanus, perhaps the author of the Epistle to the Corinthians.