Fragmentation of Poland 1138-1320 and the Piast dynasty

[Peterski]

At one point the Piasts became so numerous that it caused fragmentation of Poland between rival dukes.

This video shows Piast dynasty geneaological tree, only Piasts born between ca. 1100 - ca. 1310:

https://www.youtube.com/watch?v=woDdgTZopVw


https://www.youtube.com/watch?v=woDdgTZopVw

This video shows how borders of districts and duchies ruled by each prince were changing over time:

https://www.youtube.com/watch?v=P-Yr06xWvlw


https://www.youtube.com/watch?v=P-Yr06xWvlw

[Peterski]

Borders of historical regions of Poland were largely shaped during that period of feudal fragmentation:

https://www.theapricity.com/forum/showthread.php?278609-Polish-historical-regions-exact-map