In his youth he and his two brothers, Abraham and Niemierzym were granted by Prince Siemowit III, Duke of Masovia the Nowego Dworu (or “New Manor”).

[4] Between 1368 and 1374 was chancellor at the court of Siemowit III with whose support he was, on 16 April 1382 made archbishop of Gniezno.

However, he was arrested on his way to Rome by King Louis I of Hungary due to his families role in Hungarian dynastic affairs.

As bishop he undertook a diplomatic mission to pope Urban VI on behalf of Władysław II Jagiełło, the result of which was a papal bull of 12 March 1388 forming a bishopric in Vilnius, and between 1386 and 1394 he was a papal collector.

Archbishop Dobrogost died on 14 September 1401 in Chełmno and was buried in the Gniezno Cathedral.