Tatian of Adiabene, or Tatian the Syrian or Tatian the Assyrian, (Latin: Tatianus; Ancient Greek: Τατιανός ο Σύρος; Classical Syriac: ܛܛܝܢܘܣ; c. 120 – c. 180 AD) was an Assyrian Christian writer and theologian of the 2nd century. Tatian's most influential work is the Diatessaron, a Biblical paraphrase, or "harmony", of the four gospels that became the standard text of the four gospels in the Syriac-speaking churches until the 5th-century, after which it gave way to the four separate gospels in the Peshitta version.
