Just before the Union of Lublin (1569), the four voivodeships of (Kiev, Podlaskie, Bracław, and Wołyń) of the Grand Duchy of Lithuania were transferred to the Polish Crown by direct order of Sigismund II Augustus while the Duchy of Livonia, acquired in 1561, became a condominium (joint domain) of both Lithuania and Poland.
After the defeat of the Insurrection he stayed at the Tarnowskis’ in Dzików, in 1795 he returned to Wołyń to manage his estate.
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During the Kościuszko Insurrection, Feliński was Tadeusz Kościuszko’s secretary for French correspondence as well as the law and order commissar in Wołyń.
After 1819, Grodno, Vilnius (rus. Vilna, pol. Wilno), Minsk, Volhynia (pol. Wołyń), Podolia (pol. Podole) governorates and the Belostok Oblast remained under the chief administrative management of the Grand Duke Constantine Pavlovich of Russia.