Aire/la Lys - Que tu es donc jolie, Aire, vieille cité...
Le Baillage - Le Bastion de Thiennes - La Chapelle St-Jacques - La Collégiale Historique - Monuments aux Morts - Portes d'Arras et de Saint-Omer
		The Bastion of Thiennes The bastion of Thiennes comprises two parts built at two different times. The first part was built into 1542-1543 on command of Adrien de Croy, governor of Artois and within Jehan d' Aire, called " the Artesian one ". When the town of Surface was taken by the armies of Louis XIV into 1676, Vauban made increase the bastion by J.B. Gourdon and Charles Robelin, engineers of King de France. The Eastern part of the bastion, oldest, initially called rib vaults, bricks, bleached with lime. The second part, the extension due to Vauban, comprises two inside large gallery parallels directed of is in west. They were used of poudrière, casemates for the soldiers and housing for the " battery of flanking " from which the shootings protected the rampart and the ditches. Each one of these galleries communicated with the first bastion by two openings.
Perpendicular to the galleries, three rooms for guns of less gauge offer their southern opening full. The mouths with gun, in particular those of the large galleries are surmounted by a conduit of chimney to evacuate the fume of the shootings and its framed of two loopholes which allowed the mousquetery of car while the gunners reloaded the batteries. The opening to the west, with a grid, was bored by the Germans in 1943.
		To north, a corridor gave access to the intramural city; the gate external of the true input of the bastion was remade by Engineering in 1850. The bastion is not any more that six meters height, its ditch was located six meters lower. It was embanked during dismantling between 1893 and 1896.