Christology: A Biblical, Historical, and Systematic Study of Jesus is a 2009 theological book by the Australian Jesuit priest and academic Gerald O'Collins. This work was originally published in 1995 with the title Christology: A Biblical, Historical, and Systematic Study of Jesus Christ, but the author thoroughly revised the whole text in 2009 to take account of the numerous biblical, historical, and systematic studies of Jesus that appeared following its first edition.