The trial of Joan of Arc begins in Rouen.

The trial of Joan of Arc, a French military leader under Charles VII during the Hundred Years' War, began on 9 January 1431 and ended with her execution on 30 May. The trial is one of the most famous in history, becoming the subject of many books and films.

Rouen is a city on the River Seine, in northwestern France. It is in the prefecture of region of Normandy and the department of Seine-Maritime. Formerly one of the largest and most prosperous cities of medieval Europe, the population of the metropolitan area is 702,945 (2018). People from Rouen are known as Rouennais.

January 9 is the ninth day of the year in the Gregorian calendar; 356 days remain until the end of the year.