In 1299, Maximus, Metropolitan of Kiev and all Rus', "moved his official seat from Kiev to Vladimir, demonstrating the shift of the centre of Rus from the south-west to the north-east. The title though remained Metropolitan of Kiev and All Rus and the metropolitan was supposed to be responsible for all Orthodox Christians in Rus, including those in Galicia, which became a kingdom in 1253, and the Grand Duchy of Lithuania which had gained control of the former Polotsk Principality after the Mongol Invasion."