St. Denis Basilica is a historic church located in the suburb of Saint-Denis, just north of Paris, France. It is known as the burial site of many French kings and queens, making it a significant royal necropolis. The basilica was originally built in the 5th century and has undergone several renovations, with the most notable changes occurring in the 12th century when it became the first Gothic church. The architecture of St. Denis Basilica features stunning stained glass windows and intricate sculptures. Its design influenced many other Gothic cathedrals across Europe. Today, the basilica is a UNESCO World Heritage site and attracts visitors interested in history and architecture.