Friedrich Julius Richelot
Portrait on Richelot's tombstone
Born	(1808-11-06)6 November 1808 Königsberg, Kingdom of Prussia
Died	31 March 1875(1875-03-31) (aged 66) Königsberg, Kingdom of Prussia, German Empire
Nationality	Prussian
Alma mater	University of Königsberg
Scientific career
Fields	Mathematics
Institutions	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.

• Timeline of abelian varieties

• Friedrich Julius Richelot: De resolutione algebraica aequationis x²⁵⁷ = 1, sive de divisione circuli per bisectionem anguli septies repetitam in partes 257 inter se aequales commentatio coronata. In: Journal für die reine und angewandte Mathematik. Nr. 9, 1832, S. 1–26, 146–161, 209–230, und 337–358.