Casimir III of Płock
Casimir III of Płock (
He was the fifth son of
Life
After the death of his father on 10 September 1454, Casimir III and his siblings were placed under the guardianship of their mother Barbara and Paweł Giżycki, Bishop of Płock. The regency ended in 1462, when their older brother Konrad III attained his majority and became the legal guardian of his younger brothers.
Thanks to the efforts of Princess Catherine of Płock, in 1462, Casimir III and his brothers were able to acquire the districts of Płock, Płońsk and Zawkrze, although they lost
Casimir III and his brothers formally attained their majority on 3 April 1471. In the division of the paternal domains, he was given Płock, Płońsk, Wizna, Wyszogród and Zawkrze. Despite inheriting his own estates, Casimir III decided to enter the Church and, even in his youth, was appointed to the position of Dean and Canon of Płock Cathedral.
After the death of
After his consecration, Casimir III resigned his estates to his brothers: Conrad III obtain Wyszogród and Janusz II.
Casimir III was not able to make a great impact as a bishop. Securing the episcopal office cost him large sums of money, which he then tried to recover from the church treasury, causing understandable opposition from the chapter. The case went to the Pope, who helped the diocese taking his finances under his direct control. Soon after, Casimir III died of the plague on 9 June 1480 at Pułtusk, where he was buried.