| Pius August | |
| Duke in Bavaria | |
| Issue: | Duke Maximilian Joseph in Bavaria |
| House: | Wittelsbach |
| Father: | Duke Wilhelm in Bavaria |
| Mother: | Countess Palatine Maria Anna of Zweibrücken-Birkenfeld |
| Birth Date: | 1 August 1786 |
| Birth Place: | Landshut, Electorate of Bavaria |
| Death Place: | Bayreuth, Kingdom of Bavaria |
Duke Pius August in Bavaria,[1] full German name: Pius August Herzog in Bayern[1] (born 1 August 1786 in Landshut, Electorate of Bavaria;[1] died 3 August 1837 in Bayreuth, Kingdom of Bavaria[1]) was a Duke in Bavaria as a member of the Palatine Birkenfeld-Gelnhausen line of the House of Wittelsbach. Pius August was a grandfather of Empress Elisabeth of Austria through his son Duke Maximilian Joseph in Bavaria, as well as a great grandfather of Queen Elisabeth of the Belgians and an ancestor of the current generations of the Belgian and Italian Royal Families and the Grand Ducal Family of Luxembourg.
Born in Landshut, Pius August was the third child of Duke Wilhelm in Bavaria and his wife, Countess Palatine Maria Anna of Zweibrücken-Birkenfeld, sister of King Maximilian I of Bavaria.
Pius August married Princess Amélie Louise of Arenberg, daughter of Prince Louis Marie of Arenberg (1757-1795) and his wife, Marie Adélaïde Julie de Mailly-Nesle, Dame d'Ivry-sur-Seine (1766-1789), on 26 May 1807 in Brussels.[1] Pius August and Amélie Louise had one son:[1]
In 1815, Pius August became an honorary member of the Bavarian Academy of Sciences and Humanities. He loved to travel.