The bulk of the Silesian lands around Wrocław had passed to Mieszko's elder brother Duke Bolesław I the Tall, leaving the younger dissatisfied.

[1] Bolesław's heir, Duke Henry I the Bearded, had to renounce his claims, whereby the centuries-long division of Upper and Lower Silesia was fixed.

As Casimir's successor Duke Mieszko II the Fat was still a minor upon his father's death in 1230, the regency over his duchy was assumed by his uncle Henry I the Bearded, who thereby once again ruled over all Silesia.

He also conspired with local nobles in the Polish Seniorate Province of Kraków against High Duke Bolesław V the Chaste resulting in a 1273 rebellion.

Władysław further encouraged the Ostsiedlung establishing numerous towns like Bytom, Lędziny, Cieszyn, Pszów, Żory, Gliwice and Wodzisław, named after him.

[4] It would then fall to Margrave George of Brandenburg-Ansbach from the House of Hohenzollern, who had signed an inheritance treaty with Jan in 1522 and finally reached the consent of the Bohemian king Ferdinand I of Habsburg.