 After his stay of roughly a year and a half in the Russian capital, Križanić arrived in Tobolsk in Siberia, on 8 March 1661.He lived there for 15 years, surviving on a state stipend and working on the treatises "On Divine Providence", "On Politics", and "On Interpretation of Historic Prognostications" amongst others.In these books, written in his self-devised "Common Slavonic language" (a Pan-Slavonic grammar named "Grammatitchno Iskaziniye" that incorporated numerous Slavic languages), he set forth a comprehensive program of reforms required for the Russian state, including reforms to administration, Russian serfdom, economic policy, education, grammar, and Russia's primitive agricultural system.