Radulfus Ardens

Radulfus Ardens (Raoul Ardent; died ) was a French theologian and early scholastic philosopher of the 12th century. He was born in , Poitou.

He is known for his Summa de vitiis et virtutibus (summary of vices and virtues), also called Speculum universale (universal mirror). It is a systematic work in 14 volumes covering theology and ethics.

In his time, he was celebrated as a preacher, and a large number of his sermons survive. He was under the influence of Gilbert de la Porrée. He is thought to have been a student of Peter the Chanter.

He served as a chaplain to Richard I of England, through most of the 1190s.