Nerses III the Builder (Armenian: Ներսես Գ Շինող) was the Catholicos of the Armenian Apostolic Church between 641 and 661. He was originally from the village of Ishkhan in Tayk. He ruled at a troubled time during which Armenia had to choose between their neighbors Byzantines and Persians along with their new conquerors the Arabs. Nerses maintained friendly relations with the Byzantines and in 648 called the Council of Dvin which accepted the Council of Chalcedon, bringing it back into communion with the Orthodox Church, though based on the Monothelite compromise. The Byzantine Emperor Constans II had entered Armenia the previous year and claimed Armenia for himself, staying at Nerses's residence at Dvin for a time.