What is now France was once a province of the Roman Empire. The Latin name for these lands was Gallia—which was an approximate homophone with “galus” the Latin word for rooster—so, thanks to Latin wordplay, roosters were affiliated with the province in Roman times. France took its modern name from the Franks—warlike Germanic tribesmen who seized Gaul as Roman hegemony waned away in the middle of the Fifth century. During the French Revolution, however Frankish things became unfashionable since the Ancien Régime (and the nobility) had their roots in the Frankish conquest. The rooster thus became an unofficial symbol of the First Republic—and this affiliation remains true today during the Fourth Republic (although after the anti-aristocratic fervor of the revolution, anti-Frankish bias died away and the name was again used for all sorts of things—like money).
This unsatisfyingly exiguous history of words is actually an introduction to one of history’s more beautiful coins—the 20 Franc piece, which was minted from 1899 to 1914 by the Third Republic. On the head side of the coin is the Roman goddess Ceres, the goddess of grain, agriculture, growing, and fecundity (who was also co-opted from the Romans as a symbol of the French Democracy). She is wearing the Phrygian cap of freedom and a wreath (although sadly, her cornucopia is not pictured). The tail side is, of course, the magnificent vainglorious Gallic Rooster with the soaring motto of the Revolution “liberty, equality, brotherhood.” Admittedly the golden meaning of the words loses some of its idealism when stamped in, you know, actual gold, but it is the most beautiful chicken coin I could find from history—and there were some really good ones!