The first known formal subdivision of Kyiv dates to 1810 when the city was subdivided into 4 parts: Pechersk, Starokyiv, and the first and the second parts of Podil. In 1833–1834 according to Tsar Nicholas I's decree, Kyiv was subdivided into 6 police raions (districts); later being increased to 10. In 1917, there were 8 Raion Councils (''Duma''), which were reorganised by bolsheviks into 6 Party-Territory Raions.