Aruchavank or the Cathedral of Aruch (Արուճավանք; also Surb Grigor) is situated on a rocky plateau at the western foot of Mount Aragats in the village of Aruch in the Aragatsotn Province of Armenia.

According to wall inscriptions on the east wall and manuscripts written by historians Ghevond, Hovhannes Draskhanakerttsi, and Stepanos Asoghik, the church and adjoining building for residence (the palace) were commissioned by Prince Grigor Mamikonian and his wife Heghine/Heline between 661 and 682 AD.

There is some controversy as to the exact date of the completion of this church because of the reference in the inscription to the reign of the Byzantine Emperor Constantine III (641).

According to Marr, Haroutyunyan, and Manutcheryan, it is believed that there is confusion with the emperor Constans II (641-668).

The church had been extensively damaged by earthquakes and possibly by its use as a fortress in the 16th and 17th centuries (Oramanian, 1948).