Yuri Dolgorukiy

Yuri Dolgorukiy invited Prince Sviatoslav Olgovich to a meeting at a place called 'Moscow' in the chronicles. This first written mention of Moscow is traditionally considered the founding date of the city.

Yuri Dolgorukiy launched a campaign to seize the throne of Kiev from his nephew Iziaslav. He captured Kiev in 1149 and ruled briefly, but was expelled in 1151. He finally secured Kiev in 1155, ruling until his death.

Yuri Dolgorukiy ordered the construction of a wooden fortress (kremlin) on Borovitsky Hill in Moscow. This fortification became the nucleus of the future Moscow Kremlin and the city's defensive core.

Yuri Dolgorukiy died suddenly after a feast in Kiev, suspected of being poisoned by the Kievan boyars. His death ended his rule and led to a revolt against his administration in Kiev.