Yuri I Dolgorukiy, literally - "Yuri the Long-Armed", also known as George I of Rus', (c. 1099 – May 15, 1157) and is the founder of Moscow and a key figure in the transition of political power from Kiev to Suzdal following the death of his elder brother Mstislav the Great.

He reigns as Velikiy Kniaz (Grand Prince) of Kiev from September 1149 to April 1151 and then again from March 1155 to May 1157.