Note 349 — Chapter XI · MILITARY ARCHITECTURE IN THE LATER MIDDLE AGES: FORTIFIED TOWNS AND CASTLES

This-is the usual date given for the tower, which is entered from the first floor of the great donjon, and from the lower floor of the “lesser donjon” attached to one side of the keep. E. Lefèvre-Pontalis, Le Château de Coucy, p. 82, departs from the usual date to assign the tower to Philip Augustus, two centuries earlier. The details certainly appear to be of a period much earlier than the fifteenth century.