Archpriest Alexander Sipiagin (August 17, 1875 – January 16, 1941) was a politician, a priest of the Catholic Church and a member of Russian apostolate.
The sudden death of the wife nullifies the previous plans, Sipiagin converted to Catholicism from Russian Orthodoxy and in 1909 became a priest.
Influenced his choice acquaintance with Bishop Eduard von der Ropp, who instructed Sipyagin to teach at Roman Catholic seminary in Saratov.
From 1929 he worked at the Commission on the establishment of the Code of Canon Law of the Eastern Churches, taught in " Russicum "in publishing and research activities in the monastery of Grottaferrata.
From 1930 he taught at the missionary Institute at the John Paul II Catholic University of Lublin, Poland.