The Croatian polymath Juraj Križanić (Georgius Crisanius, 1617?-1683) travelled extensively through Croatia, Austria, Italy, Poland-Lithuania, Turkey, and Russia, spending the years 1661-1676 in exile in Tobolsk, Siberia. Križanić left seven works dealing with specific problems of music theory and history. The treatise De Musica treats different performing practices among various nations and within various genres. Križanić’s output is transnational, transcultural, transconfessional and interdisciplinary in character and approach. His thought belongs to cosmopolitism and Enlightenment of the 18th Century, but his ideas will be studied only later by Tzar Peter the Great, Russian nineteenth-century slavophiles and twentieth-century South Slavic socio-political theorists.