Career
His childhood was rather tragic, as described by several contemporary chroniclers, including Janko z Czarnkowa, although as the facts vary depending on the chronicle, it is assumed parts of that story became dramatised in the years that passed. According to Janko z Czarnkowa, when Anna became pregnant, Siemowit accused her of adultery and imprisoned her in the castle. Eventually all indicated that Henry would become a priest.
On 30 May 1378, he received a parish in Płock.
A few years later Siemowit, who wanted Henry to obtain a parish in Łęczyca, became involved in a conflict with the archbishop of Gniezno, Janusz Suchywilk, who had already given that parish to one of his supporters. Siemowit did not accept this and, as the Polish kingdom was weakened and in a state of disarray after the death of the King of Poland (Louis I of Hungary), he took control of the disputed parish with his army and occupied it for several years.
In 1391, Henry, who was known both for his incredible strength and his diplomatic skills, accepted a mission from the hands of the king of Poland, Władysław Jagiełło. The marriage led to many repercussions.
Henry was buried in the Cathedral of Płock.
Participant of his story was used by William Shakespeare in his piece, the The Winter"s Tale.