The Rue du Gros-Horloge is the main public pedestrian thoroughfare in the French city of Rouen.

[1] It takes its name from the Gros Horloge, one of the emblematic monuments of the city.

It is possible that the street is located on the axis corresponding to the decumanus of the Gallo-Roman city of Rotomagus, the former name of Rouen.

In 1527, the street was spanned by a stone arch, which then led to the old town hall.

[2] In 1932, the first Monoprix store in France opened there, under the name Noma, a contraction of “nouveau magasin” (new store).