ENThe article explores the activities of the Grand Duchy of Lithuania’s delegation in the final stage of the Lublin Diet of 1569. It analyzes the political position of the GDL representation on various issues of state and local importance. The author comes to the conclusion about the existence of an independent nobility movement in the Grand Duchy of Lithuania in the 1560s. Key words: the Union of Lublin; the General Diet; nobility; the Grand Duchy of Lithuania; the (Polish-Lithuanian) Commonwealth. [From the publication]