Prince Johann Ernst of Saxe-Weimar
| Prince Johann Ernst | |
|---|---|
The Red Castle in Weimar where Johann Ernst lived with his brother Duke Ernst August I | |
| Born | 25 December 1696 Weimar |
| Died | 1 August 1715 (aged 18) Frankfurt |
| House | House of Wettin |
| Father | Johann Ernst III, Duke of Saxe-Weimar |
| Mother | Charlotte Dorothea Sophia of Hesse-Homburg |
Johann Ernst of Saxe-Weimar (German: Johann Ernst von Sachsen-Weimar) (25 December 1696 – 1 August 1715) was a German prince, son by his second marriage of Johann Ernst III, Duke of Saxe-Weimar. Despite his early death he is remembered as a collector and commissioner of music and as a composer, some of whose concertos were arranged for harpsichord or organ by Johann Sebastian Bach, who was court organist in Weimar at the time.