This article is about Tertullian, born in the middle of the 2nd Century A.D. in Carthage.

This article is about Tertullian (c. 160 to 240 A.D.). His relation to Marcion and Montanus (Montanism) is also mentioned. His importance for apologetics, and to show that Jesus Christ is God and man, is also discussed.

Tertullian is often an unattractive figure to modern people. He had a strict asceticism, and his departure into Montanism does not help to popularize him. This paper focuses on what Tertullian's position was with regard to philosophy (notably irrationalism) and the philosophers of his day.