High Quality Content by WIKIPEDIA articles! Patriarch Alexy I (Sergey Vladimirovich Simanskiy) (Russian: Патриарх Алексий I (Сергей Владимирович Симанский)) (November 8 1877 – April 17, 1970) was the 13th Patriarch of Moscow and All Rus, Primate of the Russian Orthodox Church (ROC) between 1945 and 1970.