Dinan Fortifications by EuroTourData
Fortifications of Dinan were built between the 13th century and 1642 in the shape of an irregular polygon around the old city and have been largely restored.

Image info
View to the western defensive wall with Ducal Tower (Dinan Castle) of Dinan Fortifications.
© Creative Commons: Dinan (Côtes-d'Armor) - Remparts - Promenade des Petits-Fossés - Tour Ducale (50565081463), author Patrick. License: CC BY-SA 2.0. Cropped from original.
Fortifications of Dinan history
Major work on the construction of fortifications began after 1283, and until 1341 three city gates, many fortified towers, and defensive walls were built. After the Hundred Years' War, between 1455 and 1488 Fortifications of Dinan were expanded and were modernized to protect them from artillery. After 1585 the fortifications were again expanded. From the middle of the 17th century, the Dinan Fortifications, which no longer had that strategic importance, were mainly used to guard prisoners of war. During the French Revolution, faced with the threat of the Catholic and royal army of the Vendée, fortifications were restored.