| Christian Wiener | |
| Birth Date: | 7 December 1826 |
| Birth Place: | Darmstadt, Germany |
| Death Place: | Karlsruhe, Germany |
| Nationality: | German |
| Fields: | Mathematics |
| Workplaces: | Karlsruhe Institute of Technology |
| Alma Mater: | University of Giessen |
| Known For: | Brownian motion |
Ludwig Christian Wiener (7 December 1826 Darmstadt – 31 July 1896 Karlsruhe) was a German mathematician who specialized in descriptive geometry. Wiener was also a physicist and philosopher. In 1863, he was the first person to identify qualitatively the internal molecular cause of Brownian motion.
Wiener was the son of a judge and studied architecture and engineering in Giessen. After the state examination in 1848, he became a teacher at the "Höhere Gewerbeschule" in Darmstadt, today the Technische Universität Darmstadt.[1]
The mathematician Hermann Wiener was his son.