Who made Kiev the capital of the ancient Russian state?

This city was made the capital by Prince Oleg. This happened in 882, when he and his army were able to seize power in Kiev. After that, the Slavic tribes were united into a single state. So Kiev became the capital of ancient Russia. The prince himself called this city “the mother of Russian cities”. At that time, Kiev occupied an advantageous geographical position, and was also located at the junction of important trade routes that contributed to the development of the city.