The article focuses on a rarely discussed border agreement between Iran and Turkey concluded in 1934. Iran obtained some 80 square miles near its northwestern border south of Bayazid, while Turkey obtained some 90 square miles east of Qotur (Kotur) northeast of Lake Urmya. In addition, Turkey also received Lesser Ararat and the plain around it (which had been part of Iran since 1639). Thus, Turkey, which had taken over Greater Ararat in the 1921 treaties of Moscow and Kars, ended controlling both peaks. The article seeks to correct the errors on the maps on various books printed in the West.