Friedrich Julius Richelot

{{Short description|German mathematician}}

{{Infobox scientist

| name = Friedrich Julius Richelot

| image = Julius-Richelot-Portrait.jpg

| image_size =

| alt =

| caption = Portrait on Richelot's tombstone

| birth_date = {{Birth date|1808|11|06|df=y}}

| birth_place = Königsberg, Kingdom of Prussia

| death_date = {{Death date and age|1875|03|31|1808|11|06|df=y}}

| 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

| known_for =

| awards =

}}

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.Kösener Korps-Listen 1910, 141, 8

He died in Königsberg in 1875.