Kiewer Höhlenkloster
In the post-medieval period, the name "Little Rus"' was first used by the Eastern Orthodox clergy of the Polish–Lithuanian Commonwealth, e.g. by influential cleric and writer Ioan Vyshensky (1600, 1608), Metropolitan Matthew of Kiev and All Rus' (1606), Bishop Ioann (Biretskoy) of Peremyshl, Metropolitan Isaiah (Kopinsky) of Kiev, Archimandrite Zacharias Kopystensky of Kiev Pechersk Lavra, etc. The term has been applied to all Orthodox Ruthenian lands of the Polish–Lithuanian Commonwealth. Vyshensky addressed "the Christians of Little Russia, brotherhoods of Lviv and Vilna," and Kopystensky wrote "Little Russia, or Kiev and Lithuania."