Mstsislaw is a town in Mahilyow Voblast, Eastern Belarus. As of 2004, its population is 11,700. Mstsislaw was first mentioned in the Ipatiev Chronicle under 1156. It was initially included within the Principality of Smolensk, but had become the capital of the Principality of Mstsislaw by 1180 (...) (from Wikipedia)