While one of his sons was known as the Wise, and this state converted to Christianity under Vladimir the Great.
One ruler of this state was bribed by the Byzantines to invade Bulgaria, won the battle of Silistra, and even besieged Adrianople before being forced to evacuate all of Bulgaria by Emperor John Tzimiskes. Many cities that formed this state had a popular assembly called the veche. Its first ruler was Oleg, while the previously described ruler was Sviatoslav. This state's most famous ruler rejected Islam, because it prohibited drinking alcohol, and Judaism, as he felt that the Jews had been abandoned by God. That man was married to Anna Porphyrogeneta, the sister of Basil II, and was awed by the (*) Hagia Sophia. While one of his sons was known as the Wise, and this state converted to Christianity under Vladimir the Great. For 10 points, name this medieval Russian state centered at the modern day capital of Ukraine.
One ruler of this state was bribed by the Byzantines to invade Bulgaria, won the battle of Silistra, and even besieged Adrianople before being forced to evacuate all of Bulgaria by Emperor John Tzimiskes.
Kievan Rus