This page lists the armoury (emblazons=graphics and blazons=heraldic descriptions; or coats of arms) of the communes in Seine-Maritime.
(création : Robert Louis, adoptée par délibération du conseil municipal du 27 juin 1986) (création : Jacques du Bourg, 1977) Note that on the front of the "Grand Poste" (rue Jeanne d'Arc), the banner is charged with a leopard (i.e. the lion passant seen on Norman and English arms).
This was the official seal of Rouen at the beginning of the 12th century.