João I, Duke of Braganza
| João I | |
|---|---|
D. João I; Palace of the Dukes of Braganza | |
| Duke of Braganza | |
| Tenure | 22 September 1563 – 22 February 1583 |
| Predecessor | Teodósio I |
| Successor | Teodósio II |
| Born | 1543 Vila Viçosa, Alentejo, Kingdom of Portugal |
| Died | 22 February 1583 (aged 39–40) Vila Viçosa, Vila Viçosa Municipality, Kingdom of Portugal |
| Spouse | Infanta Catherine of Portugal |
| Issue among others... | Teodósio II, Duke of Braganza |
| House | Braganza |
| Father | Teodósio I |
| Mother | Isabel of Lencastre |
Dom João I of Braganza (1543 – 22 February 1583) was the 6th Duke of Braganza and 1st Duke of Barcelos, among other titles. He is known for pushing the claims of his wife, Infanta Catherine of Portugal, to the throne of Portugal.