In recognition of his diplomatic talent, Henry of Valois appointed him in 1574, at the coronation sejm of the Crown Deputy, and then Stefan Batory as the Grand Chancellor of the Crown in 1576 and the Bishop of Przemyśl. Shortly thereafter, he submitted the chancellor's seal to Jan Zamoyski, and having not yet approved the papacy for the diocese of Przemyśl, he was nominated for the bishopric in Płock, where his rule lasted from 5 July 1577 until his death on 28 August 1590.
In 1575 he signed the election of Maximilian II, Holy Roman Emperor.[2] In 1589, he was a signatory of the ratification of the Treaty of Bytom and Będzin at the pacification parliament.[3]
As a bishop of Płock, he twice conducted a diocesan synod in Płock and Pułtusk (1586 and 1589), which contributed to the reception of the reform undertaken at the Council of Trent in the diocese of Płock. He built the bishop's palace in Wyszków (1589); he renewed the collegiate church in Pułtusk.
He was also known as a bibliophile - imported from abroad books he had set in light yellow parchment and brown skin. Accumulated books were donated by the Kraków Academy (about 1000 volumes) and the library of the Płock chapter (130 works).
