The 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 in 1144, shows the first use of all of the elements of Gothic architecture.
The site originated as a Gallo-Roman cemetery in late Roman times. The archeological remains still lie beneath the cathedral; the people buried there seem to have had a faith that was a mix of Christian and pre-Christian beliefs and practices. Around 475 St. Genevieve purchased some land and built Saint-Denys de la Chapelle. In 636 on the orders of Dagobert I the relics of Saint Denis, a patron saint of France, were reinterred in the basilica. The relics of St-Denis, which had been transferred to the parish church of the town in 1795, were brought back again to the abbey in 1819.
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