Diatessaron

The Diatessaron; (Syriac:ܐܘܢܓܠܝܘܢ ܕܡܚܠܛܐ‎, translit. Ewangeliyôn Damhalltê), (c. 160–175) is the most prominent early Gospel harmony; and was created by Tatian, an early Christian Assyrian apologist and ascetic. Tatian sought to combine all the textual material he found in the four gospels—Matthew, Mark, Luke, and John—into a single coherent narrative of Jesus's life and death. However, and in contradistinction to most later gospel harmonists, Tatian appears not to have been motivated by any aspiration to validate the four separate canonical gospel accounts; or to demonstrate that, as they stood, they could each be shown as being without inconsistency or error.