The Cathedral Basilica of Our Lady of Amiens (Basilique Cathédrale Notre-Dame d'Amiens) is a Roman Catholic cathedral and seat of the Bishop of Amiens. It is situated on a slight ridge overlooking the

River Somme in Amiens, the administrative capital of the Picardy region of France, some 120 kilometres (75 miles) north of Paris.

The cathedral of Amiens is today the largest French church building of the Middle Ages. 

Medieval cathedral builders were trying to maximize the internal dimensions in order to reach for the heavens and bring in more light. In that regard, the Amiens cathedral is the tallest complete cathedral in France, its stone-vaulted nave reaching an internal height of 42.30 metres (138.8 ft) (surpassed only by the incomplete Beauvais Cathedral). It also has the greatest interior volume of any French cathedral, estimated at 200,000 cubic metres (260,000 cu yd). The cathedral was built between 1220 and c.1270 and has been listed as a UNESCO World Heritage Site since 1981.

Although it has lost most of its original stained glass, Amiens Cathedral is renowned for the quality and quantity of early 13th-century Gothic sculpture in the main west façade and the south transept portal, and a

large quantity of polychrome sculpture from later periods inside the building

.

The lack of documentation concerning the construction of the Gothic cathedral may be in part the result of fires that destroyed the chapter archives in 1218 and again in 1258—a fire that damaged the cathedral itself. Bishop Evrard de Fouilly initiated work on the cathedral in 1220. Robert de Luzarches was the architect until 1228, and was followed by Thomas de Cormont until 1258. His son, Renaud de Cormont, acted as the architect until 1288. The chronicle of Corbie gives a completion date for the cathedral of 1266. Finishing works continued, however. Its floors are covered with a number of designs, such as the bent cross (to symbolize Jesus' triumph over death).

The labyrinth was installed in 1288. The cathedral contains the alleged head of Jean the Baptist, a relic brought from Constantinople by Wallon de Sarton as he was returning from the Fourth Crusade.

The construction of the cathedral at this period can be seen as resulting from a coming together of necessity and opportunity. The destruction of earlier buildings and attempts at rebuilding by fire forced the fairly rapid construction of a building that, consequently, has a good deal of artistic unity. The long and relatively peaceful reign of Louis IX of France brought a prosperity to the region, based on thriving agriculture and a booming cloth trade, that made the investment possible. The great cathedrals of Reims and Chartres are roughly contemporary.

The original design of the flying buttresses around the choir had them placed too high to counteract the force of the ceiling arch pushing outwards resulting in excessive lateral forces being placed on the vertical columns. The structure was only saved when, centuries later, masons placed a second row of more robust flying buttresses that connected lower down on the outer wall. This fix failed to counteract similar issues with the lower wall which began to develop large cracks around the late Middle Ages. This was solved by another patch that consisted of a wrought iron bar chain being installed around the mezzanine level to resist the forces pushing the stone columns outward. The chain was installed red hot to act as a cinch, tightening as it cooled.

The west front of the cathedral , built in a single campaign 1220–36, shows an unusual degree of artistic unity: its lower tier with three vast deep porches is capped with the gallery of twenty-two over lifesize kings, which stretches across the entire façade beneath the rose window. Above the rose window there is an open arcade, the galerie des sonneurs. Flanking the nave, the two towers were built without close regard to the former design, the south tower being finished in 1366, the north one, reaching higher, in 1406.

The Western portals

of the cathedral are justly famous for their elaborate sculpture, featuring a gallery of locally-important saints and large eschatological scenes. Statues of saints in the portal of the cathedral have been identified as including the locally venerated Saints Victoricus and Gentian, Saint Domitius, Saint Ulphia, and Saint Fermin.
The spire over the central crossing was added between 1529 and 1533.

During the fighting in First world War , Amiens was bombarded by German artillery and aircraft; more than 2,000 buildings were destroyed but the catherdral remainded intackt.

source (copy-pasted from): wikipedia (April 1st 2014)