Also known as St. Thaddeus Monastery, Kara Kilise has been registered in UNESCO World Heritage as the ninth monument of the country. It is one of the most beautiful historical monuments of West Azerbaijan Province which attracts very tourist with its unique and special architecture.
Kara Kilise is among Armenian religious monuments in Iran which has been demolished and reconstructed in different periods. A huge part of the monastery was torn down at the time of the Mongolian Changis Khan's attack for the first time. However, it was refurbished in Hulagu Khan's reign by Khawaja Nasir al-Din al-Tusi.
Every year on June 26, Armenians around the world go to this place to visit St. Thaddeus Monastery. In addition to them, some Christian countries ambassadors who work in Iran as well as foreing toursist accompany Armenians in visitng ceremony of St. Thaddeus Monastery.