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Volhynian Governorate (Russian: Волынская губерния, Volýnskaja gubérnija, Ukrainian: Волинська губернія, Volýnsʹka hubérnija) was an administrative-territorial unit initially of the Russian Empire, created at the end of 1796 after the Third Partition of Poland from the territory of the short-lived Volhynian Vice-royalty and Wołyń Voivodeship.

The Roman Catholic Diocese of Kyiv-Zhytomyr (Latin: Dioecesis Kioviensis-Zytomeriensis) is a suffragan diocese of the Latin Rite of the Catholic Church in Ukraine in ecclesiastical province of the Metropolitan Archdiocese of Lviv of the Latins.Its cathedral episcopal see is the St. Sophia's Cathedral, Zhytomyr (Житомир), Zhytomyr Oblast.

Saint Sophia's Cathedral (Ukrainian: Кафедральний собор св. Софії) is a Catholic temple that serves as the principal church of the Roman Catholic Diocese of Kyiv-Zhytomyr, Ukraine. The temple was built between 1746 and 1748 and was founded by Bishop Samuel Jan Ozga.After a fire in 1768, the temple was converted into a building of three ships in the classical style.