I. Péter ukrán integrációs politikája a poltavai csatát követően Pásztor Renáta The study presents views on the changes of the relations between the Russian Empire and the Hetmanate after the battle of Poltava on 27 June 1709. Beside using literature I mainly focused on source-centricity and I examined Peter I’s correspondence by using the volumes of Письма и Бумаги императора Петра Великого. The main objective of the study is to present how the Tsar’s attitude to Ukrainian territories changed after the Russian victory and how the integration of Ukrainian territories developed. Keywords: Ukrainian, Russian, relations, 18th century, Peter I, Ivan Mazepa, Hetmanate.