John Frederick I, Elector of Saxony
| John Frederick I | |
|---|---|
Portrait by Lucas Cranach the Elder, 1531 | |
| Elector of Saxony | |
| Reign | 16 August 1532 – 24 April 1547 |
| Predecessor | John |
| Successor | Maurice |
| Duke of Saxony | |
| Reign | 24 April 1547 – 3 March 1554 |
| Predecessor | Maurice |
| Successor | John Frederick II |
| Landgrave of Thuringia | |
| Reign | 16 August 1532 – 24 April 1547 |
| Predecessor | John |
| Successor | John Ernest |
| Born | 30 June 1503 Torgau, Electorate of Saxony, Holy Roman Empire |
| Died | 3 March 1554 (aged 50) Weimar, Electorate of Saxony, Holy Roman Empire |
| Burial | |
| Spouse | Sybille of Cleves |
| Issue | John Frederick II, Duke of Saxony John William, Duke of Saxe-Weimar John Frederick III, Duke of Saxe-Gotha |
| House | Wettin (Ernestine line) |
| Father | John, Elector of Saxony |
| Mother | Sophie of Mecklenburg-Schwerin |
| Religion | Roman Catholic (1503–1521) Lutheran (1521–1554) |
| Signature | |
John Frederick I (German: Johann Friedrich I. von Sachsen; called the Magnanimous der Großmütige; 30 June 1503 – 3 March 1554) was the Prince-Elector and Arch-Marshal of the Holy Roman Empire (1532–1547) from the Ernestine branch of the Saxon ruling House of Wettin, who initially governed over the Ernestine Electorate of Saxony, centred on Saxe-Wittenberg, until he was deprived of his electoral titles and most domains by the Capitulation of Wittenberg (1547). He was left with the Saxon ducal title, and Ernestine possessions in Thuringia. Previously, he was leading the Schmalkaldic League, a military alliance of Lutheran principalities.