The initial Sejm negotiations on unity in January 1569, near the Polish city of Lublin, were futile. The right of Poles to settle and own land in the Grand Duchy was questioned by Lithuanian envoys. Following Mikołaj Radziwiłł's departure from Lublin on 1 March 1569, Sigismund announced the incorporation of then-Lithuanian Podlachia, Volhynia, Podolia and Kiev provinces into Poland, with strong approval from the local Ruthenian (Ukrainian) gentry. Those historic regions, which once belonged to the Kievan Rus', were disputed between Lithuania and Russia. However, the Ruthenian nobles were eager to capitalise on the political or economic potential offered by the Polish sphere and agreed to the terms. Previously, the Kingdom of Ruthenia or "Ukraine" was abolished in 1349, after Poland and Lithuania split modern-day Ukraine in the aftermath of the Galicia–Volhynia Wars. Now, under the Union of Lublin, all Ukrainian and Ruthenian territories which were alien in culture, customs, religion and language to the Polish people would be annexed by Catholic Poland. Strong westernisation and polonisation would follow, including the clandestine suppression of the Ukrainian Eastern Orthodox Church by future king Sigismund III. Ruthenia remained under Polish rule until the Cossack uprisings against Polish domination and the Partitions of Poland, when Ukraine was annexed by the Russian Empire.