What is Principality of Polotsk?
{{Infobox former country |native_name = {{lang|lt|Полацкае княства}} |conventional_long_name = Principality of Polotsk<br><small>(vassal of [[Kievan Rus'|Rus']] to 1021, part of [[Grand Duchy of Lithuania|Lithuania]] since 1307)</small> |common_name = Polotsk |region = Europe |year_start = 9th century |year_end = 1397 |image_map = Alex K Polotsk general.png |image_caption = Dots represent cities of Minsk and Polotsk |event_end = Incorporation into [[Grand Duchy of Lithuania|Lithuania]] |p1 = |image_p1 = |s1 = Grand Duchy of Lithuania |image_s1 = [[Image:Lithuanian coat of arms Vytis. 16th century.jpg|20px|Grand Duchy of Lithuania]] |religion = Eastern Orthodox Church |capital = [[Polotsk]] |government_type = Principality |legislature = Veche |title_leader = Prince of Polotsk |leader1 = [[Vseslav of Polotsk|Vseslav]] |year_leader1 = 1044—1101 |common_languages = [[Old East Slavic]] |category= }} The '''Principality of Polotsk''', also known as the '''Kingdom of Polotsk''' or the '''Duchy of Polotsk''' was a medieval principality of the [[East Slavs|Early East Slavs]]. It was considered one of the principalities in the [[Kievan Rus']]. It had a wide degree of power to make its own rules. It was started around the ancient town of [[Polotsk]]. It is not clear the date it started. Polotsk is mentioned in the mid 9th century as part of [[Novgorod]]. In the second half of 10th century Polotsk was ruled by its own dynasty. The first ruler that is mentioned in the history was a semi-legendary [[Rogvolod]] (? - 978). Rogvolod is better known as the father of [[Rogneda]]. The Principality was in several succession crises of the 11-12th centuries and a war with the Land of Novgorod. By the 13th century it was added into the [[Grand Duchy of Lithuania]]. At the time it w