Rabban Hormizd Monastery (Syriac: ܪܒܢ ܗܘܪܡܝܙܕ ܥܓ̰ܡܝܐ) is an important monastery of the Chaldean Catholic Church, founded about 640 AD, carved out in the mountains about 2 miles from Alqosh, Iraq, 28 miles north of Mosul. It was the official residence of the patriarchs of the Eliya line of the Assyrian Church of the East from 1551 to the 18th century, and after the union with Rome in the early 19th century, it became a prominent monastery of the Chaldean Catholic Church.
The monastery is named after Rabban Hormizd (rabban is the Syriac for monk) of the Church of the East, who founded it in the seventh century.