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. Life Henry IV was the only son of Duke Henry III the White of Silesia-Wrocław by his first wife Judith, daughter of Duke Konrad I of Masovia. Under the tutelage of Władysław of Salzburg and King Ottokar II of Bohemia A minor upon the early death of his father in 1266, Henry IV was placed under the guardianship of his paternal uncle, Archbishop Władysław of Salzburg. The Archbishop decided that the constant travels between Wrocław and Salzburg were inappropriate for a child, and, in 1267, sent Henry to Prague to be raised at the court of King Ottokar II of Bohemia. Ottokar after Władysław's death in 1270 also took over Wrocław. Shortly after the death of his uncle (who left him as his universal heir), Henry IV returned to Wrocław, where he found himself under the direct care of one of the closest advisers of his late father, Simon Gallicusa. Henry IV received a careful education, which may explain his subsequent interest in culture and poetry (there are reasonable suspicions that the Duke wrote some poems in old Polish). The cooperation between Henry IV and King Ottokar II was exemplary. In 1271 Henry IV participated in an armed expedition against Hungary, which brought an attack on Wrocław by the Árpád princes and their allies, the Dukes of Greater and Lesser Poland. In 1273 Henry IV was formally proclaimed an adult and by himself assumed the government of his Silesian Duchy of Wrocław, which, however, after the split between Opole, Legnica and Głogów only comprised the eastern part of the Lower Silesian lands. He began to follow a policy which was more independent from Bohemia, including in respect to friendly relations with his Upper Silesian cousin Duke Władysław of Opole and also with duke Przemysł II of Greater Poland. Kidnapping of Henry IV by Bolesław II the Bald Henry supported King Ottokar II in his fierce conflict with King Rudolph I of Germany in 1276, giving food and refuge to the Bohemian troops. When Ottokar was placed under the Imperial ban, Duke Bolesław II the