The Titles of Jesus in Christology was recognised as a major contribution to Christological study when it was first published in German in 1963. Its translation into English a few years later cemented this status. Hahn undertakes a massive and detailed examination of the various traditions that led to the use of names for Jesus that we now recognise as characteristic of the very early Church. Moreover, he carefully distinguishes between the different Christological conceptions present in these differing branches of primitive Christianity, and embodied in the terms they produced. His analysis and categories have been followed by many later scholars, who built on his detailed study of the peculiarities of the different titles given to Jesus by the different communities that followed him.