The Cathedral Basilica of 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 is considered to be the first Gothic church ever built. The basilica became a place of pilgrimage and the burial place of the French kings, with nearly every king from the 10th to the 18th centuries being buried there, as well as many from previous centuries.