Iziaslav Vladimirovich was the son of Vladimir I of Kiev and Rogneda of Polotsk. He was the progenitor of the Polotsk branch of Rurikid princes known as the Iziaslavichi.
The Principality of Polotsk, also known as the Duchy of Polotsk or Polotskian Rus', was a medieval principality. The origin and date of the establishment of the state are uncertain. Chronicles of Kiev
Saint Sophia Cathedral in Polotsk (rebuilt in the mid-18th century)
The Orsha Gospel Book was created in Polotsk during the town's period of decline in the 13th century.