| Peter I of Rosenberg | |
| More: | no |
| Spouse: | Viola of Teschen (died 1317) |
| Spouse-Type: | Wives |
| Issue: |
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| Native Name: | Petr I. z Rožmberka |
| Noble Family: | Rosenberg family |
| Death Date: | 14 October 1347 |
| Burial Place: | Vyšší Brod Monastery |
Peter I of Rosenberg (Czech: Petr I. z Rožmberka; died 14 October 1347)[1] was lord chamberlain of the Kingdom of Bohemia,[2] who acted as regent during John of Bohemia's absences at war between 1339 and 1346. He was a patron of Vyšší Brod Monastery[1] and is thought to have commissioned the Master of Vyšší Brod altarpiece.[3] In 1316 he married Viola of Teschen, former queen consort (wife of king Wenceslaus III).