Sheptytsky was born as Kazimierz Maria Szeptycki on 17 November 1869 in the village of
Prylbychi, Yavorich Region, near
Lviv in
Galicia to
an old Polish-Ruthenian noble family. The Szeptycki family lived in the eastern part of Poland, near
Zamość, in Labunie's Palace. At that time, the area was of the
Austro-Hungarian Empire. He was a younger brother of the future
Venerable,
Metropolitan Bishop Andrey Sheptytsky, and received his education first at home and starting in 1882 at
Kraków. Sheptytsky later also studied in
Munich and
Paris. In 1892 he became a
doctor of law at the
Jagiellonian University. After finishing his studies, he returned home to manage the family estates and look after his aging parents. In 1900 Casimir Sheptytsky was elected to the Austrian parliament, and a member of the National Council, however after its dissolution in 1907 he decided to withdraw from politics. In 1911 Sheptytsky decided to become a
monk and entered the
Benedictine (
Latin Rite)
Beuron Archabbey (
Baden-Württemberg), Germany. After a year he decided to follow the example of his older brother, returning to the
Ukrainian Greek Catholic Church of their ancestors and entered the
Studite Monastery at
Kamenica, near
Čelinac,
Bosnia-Herzegovina. In 1937 he came to
Lviv to aide his ailing brother
Andrew (Andrey). In 1939 the region was occupied by communists, the Soviet "liberators" immediately implemented a plan to eliminate the Ukrainian intellectual elites and church. At the time they did not arrest the Metropolitan himself, fearing his great authority among the nation, but went after his family attempting to capture Sheptytsky and murdering their brother Leon along with his family. On 17 September 1939, Metropolitan Andrey appointed Klymentiy Sheptytsky the
Russian Catholic Apostolic Exarch of Great Russia and Siberia. Communication with the Vatican was limited because of the Soviet annexation, but the Vatican officially recognized this appointment in November or December 1941. The borders of the apostolic exarchate were defined as "ethnic
Great Russia,
Finland, and
Siberia" by the 1942
synod of exarchs, though he had practically no connection with anyone there because it was all under Soviet control. Sheptytsky still prepared literature for possible future missionary work there and in 1942 established a separate
vicariate for Siberia. When the Russian Jesuit
Viktor Novikov secretly went into Soviet territory, he was designated vice-exarch of Siberia by Sheptytsky. ==World War II==