From the late 18th century until the late 19th century, city life was increasingly dominated by Russian military and ecclesiastical concerns. Russian Orthodox Church institutions formed a significant part of the city's infrastructure and business activity at that time. In the winter 1845–1846, the historian Mykola Kostomarov (Nikolay Kostomarov in Russian) founded a secret political society, the Brotherhood of Saints Cyril and Methodius, whose members put forward the idea of a federation of free Slavic people with Ukrainians as a distinct group among them rather than a part of the Russian nation. The Brotherhood's ideology was a synthesis of programmes of three movements: Ukrainian autonomists, Polish democrats, and Russian Decembrists in Ukraine. The society was quickly suppressed by the Tsarist authorities in March–April 1847.