This lecture provides an overview of Iranian Armenian Church architecture. Due to the historical presence of Armenians and Assyrians as two historical nations, today, there are hundreds of churches in different geographic parts of Iran, which have remained from different periods and cultural-political conditions. The religious architecture of the Armenian churches in Iran has more than 1,700 years of history along with considerable geographical dispersion. It sets on the typology of construction method, floor plan, and decorative style. Each typological example is considered in the context of regional architectural currents, including Byzantine and Iranian. These churches are located in Armenian settlements where their presence in Iran can be studied under two main factors. Armenians living around the Urmia lake (in the north-western part of Iran) are native to this area and the Armenians living in other parts of the country have come to those lands during forced migrations as a reason of Armenian genocide or revolution. The construction style of the churches also reflects their geographical dispersions. Armenian churches constructed over different periods are divided into three...