Duke of Siewierz Bishop of Nitra
He was the fifth and youngest son of Duke Casimir of Bytom by his wife Helena. Nevertheless, after his father"s death in 1312 he received the town of Siewierz, but he continued his church career and in 1313 he joined to the Knights Hospitaller.
As the youngest son, Mieszko was destined to the clergy since his early childhood. The government of Mieszko over Nitra wasn"t easy. Despite all the problems, he was completely involved in activities who raised the importance of his episcopal city, and decided to start his rule with huge impetus, built a new cathedral (who was completed after his death in 1355).
In 1334, and after years of continuous conflict with the Chapter, Mieszko was named Bishop of Veszprém (this time with the consent of the Pope and the local nobility).
During this time, he also held the position of chancellor of Queen Elisabeth of Hungary (who certainly was involved in the election of Mieszko as Bishop), who bought him important benefits (Mieszko received from Federal Chancellery the amount of 500 fines per year by orders of Queen Elisabeth). During the last years of his life, Mieszko continued with his close cooperation with the Hungarian House of Anjou.
In 1342 he participated in the coronation of the new King Louis, who also remained in close contact. Mieszko died in 1344 and was buried in the cathedral of Veszprém.
