Przemyslaus I Noszak, Duke of Cieszyn

Przemyslaus I Noszak (1334–1410) was a Piast duke who ruled Cieszyn from 1358, after his elder brothers' early deaths made him Casimir I's chief heir. He served Emperor Charles IV at Prague and became a leading diplomat, helping arrange Anne of Bohemia's marriage to Richard II of England.

Under Wenceslaus IV he governed Bohemia in 1386 and acted as vicar in Germany. His eldest son was murdered in 1406 in a noble feud, and Przemyslaus died in 1410.