Henryk IV Probus
Henryk IV Probus (Latin for "the Righteous") ( or "Prawy"; ) ( – 23 June 1290) was a member of the Silesian branch of the royal Polish Piast dynasty. He was Duke of Silesia at Wrocław from 1266, and from also 1288 High Duke of the Polish Seniorate Province of Kraków until his death in 1290.