Henry I the Bearded
Casimir died on 13 May 1230. According to his will, Viola was appointed regent of the duchy on behalf of their sons, Mieszko II and Władysław, neither of whom had attained majority. Despite her efforts to maintain an independent rule, she was eventually forced to share, and later to cede, the regency of Opole-Racibórz to Henry I the Bearded, Duke of Wrocław.