Basilica of St Denis

The Cathedral Basilica of Saint Denis (French: Cathédrale royale de Saint-Denis, or simply Basilique Saint-Denis, previously the Abbaye de Saint-Denis) is a large medieval abbey church in the city of Saint-Denis, now a northern suburb of Paris. The building is of unique importance historically and architecturally, as its choir completed in 1144 is considered to be the first Gothic church ever built.

• http://en.wikipedia.org/wiki/Basilica of St Denis