Piotr of Grudziądz

Piotr of Grudziądz, or Petrus Wilhelmi de Grudencz (1392–c. 1480), was a composer and poet born at Graudenz (Grudziądz) in Prussia. He studied at the University of Kraków from 1418 and later worked in Vienna and near Basel.

In the 1440s he was chaplain to Emperor Frederick III in Vienna. In 1448 he served at the bishop's court in Wrocław and in 1452 travelled to Rome, spending his last years in Silesia.

Fewer than twenty of his works survive, identified by acrostics of his name; his songs and motets reflect the musical culture of medieval Central Europe.