High Quality Content by WIKIPEDIA articles! Vseslav of Polotsk or Vseslav Bryachislavich, also known as Vseslav the Sorcerer or Vseslav the Seer (c. 1039 1101), was the most famous ruler of Polotsk and was briefly Grand Prince of Kiev in 1068 1069. Polotsk's Cathedral of Holy Wisdom (completed in 1066) is one of the most enduring monuments on the lands of modern Belarus and dates to his 57-year reign.The reverse of a 20 ruble Belarusian silver commemorative coin issued in 2005 with Vseslav ("Usiaslau") of Polotsk and a depiction of him as a werewolf in the background. Vselav was the son of Bryachislav Izyaslavich, Prince of Polotsk and Vitebsk, and was thus the great-grandson of Vladimir I of Kiev and Rogneda of Polotsk. He was born in ca. 1030 1039 in Polotsk (with Vasilii as his baptismal name) and married around 1060.