St. Sophia Cathedral in Kiev

St. Sophia Cathedral is the most ancient temple of Kievan Rus. It was founded during the reign of Prince Yaroslav the Wise on the site of the victory over the Polovtsians. The Cathedral has been the center of religious and political life for centuries. Here The Kievan Veche (popular assembly) took place, The Kievan princes took possession, and the first library in Russia was founded here.