Viola, Duchess of Opole
Viola, Duchess of Opole, also known as Veleslava (Bulgarian: Венцислава), Polish: Wencisława-Wiola; (died 7 September 1251) was a Duchess consort of Opole-Racibórz through her marriage to Casimir I. She served as regent during the minority of her sons Mieszko II and Władysław between 1230 and 1233.