Michael, Metropolitain of Kiev, et al.2005-03-272005-03-271595http://www.fordham.edu/halsall/mod/1595brest.htmlhttps://hdl.handle.net/1813/67436123 bytesapplication/pdfenTreatyRussiaOrthodox ChristianityRoman CatholicismKievan Rus'King Sigmund AugustusGreek CatholicismPolandother