Jan Cienski

Bishop Jan Cieński (; 7 January 1905 – 26 December 1992) was a Roman Catholic clandestine prelate from Ukraine as an Auxiliary bishop of Archdiocese of Lviv and a single Roman Catholic prelate in Ukraine since 30 June 1967 until 16 January 1991, when a Roman Catholic hierarchy was reestablished in Ukraine.

Life Bishop Cieński was born in the noble szlachta family of a politician Tadeusz Cieński and Maria (née countess Dzieduszycka) Cieńska in present-day Western Ukraine. His maternal grandfather was Polish landowner, naturalist, political activist, collector and patron of arts of Ukrainian origins Count Włodzimierz Dzieduszycki.

In 1962 Bishop Cieński was clandestinely appointed by Pope John XXIII as an Auxiliary Bishop of the Archdiocese of Lviv.

Bishop Jan Cieński secretly ordained several Greek Catholic and Roman Catholic priests, one of them being Bishop Leon Malyi, auxiliary bishop of Archdiocese of Lviv.