The Monastery of Saint Thaddeus is an ancient Armenian monastery in the mountainous area of West Azerbaijan Province, Iran. It is believed to be one of the oldest church buildings in the world
Also known as Kara Kilise, it is located about 20 kilometers from the town of Chaldiran. The monastery and its distinctive Armenian conical roofs are visible from long distances.The Monastery is site of the Pilgrimage of St. Thaddeus which in 2020 was added by UNESCO to its list of Intangible Cultural Heritage.
Wikipedia https://en.wikipedia.org/wiki/St._Thaddeus_Monastery
Address Iran
Coordinates 39°5'32.392" N 44°32'39.654" E