In 1290, in the process of feudal fragmentation of Poland the Duchy of Teschen was split from it also encompassing both banks of the river, additionally several new settlements were established alongside the river.
The Duchy of Teschen was split from it also encompassing both banks of the river. This was in the process of feudal fragmentation of Poland. This was in 1290. Several new settlements were established alongside the river. This was in the process of feudal fragmentation of Poland. This was in 1290.