David the Invincible (ClassicalArmenian: Դաւիթ Անյաղթ; reformed: Դավիթ Անհաղթ, Davit' Anhağt' ) was a 5th-century Armenianphilosopher. He is best known as the author of several works including Definition of Philosophy and Exegesis of Aristotle. He was the member of Neoplatonic school and the founder of a non-religious branch of Medieval Armenian philosophy.
David Anhaght was born in Nergin in the Taron province of Armenia. David the Invincible worked out of Alexandria, Egypt and was highly interested and gave courses of Aristotle's Physics. It is believed that he received the nickname Anhaght, meaning invincible, due to his exceptional oratory and argumentative skills. After spending many years abroad, Anhaght returned to Armenia where he taught philosophy and science. The church, however, was discontent over much of his teachings and he was forced to seek refuge. He ultimately died in Haghbat.