| Friedrich Julius Richelot | |
| Birth Date: | 6 November 1808 |
| Birth Place: | Königsberg, Kingdom of Prussia |
| Death Place: | Königsberg, Kingdom of Prussia, German Empire |
| Nationality: | Prussian |
| Fields: | Mathematics |
| Workplaces: | University of Königsberg |
| Alma Mater: | University of Königsberg |
| Doctoral Advisor: | Carl Gustav Jacob Jacobi |
| Doctoral Students: | Carl Neumann Heinrich Schröter |
Friedrich Julius Richelot (6 November 1808 – 31 March 1875) was a German mathematician, born in Königsberg. He was a student of Carl Gustav Jacob Jacobi.
He was promoted in 1831 at the Philosophical Faculty of the University of Königsberg with a dissertation on the division of the circle into 257 equal parts (see references) and was a professor there.
Richelot authored numerous publications in German, French and Latin, among them — with his 1832 dissertation — the first known guide to the Euclidean construction of the regular 257-gon with compass and straightedge.
In 1825, he joined the Corps Masovia.[1]
He died in Königsberg in 1875.