Defender of Orthodoxy
Alexander Nevsky's dual role — military defender on the western frontier and diplomatic mediator with the Mongol east — has been interpreted by the Church as a form of pastoral guardianship of the Russian people and their Orthodox faith. He resisted the advance of Latin Christianity by force when militarily feasible, while accepting Mongol political suzerainty as preferable to the alternative of religious coercion from the West. This calculus, however contested by historians, forms the basis of his veneration as a 'right-believing prince' — one who governed in fidelity to Orthodox Christian values.
He took monastic vows before death, receiving the Great Schema — the strictest form of Orthodox monasticism — on his deathbed. This act is understood in Orthodox tradition as a final and complete dedication of his life to Christ.