Église Saint-Sulpice, located in the 6th arrondissement of Paris, is a majestic classical church known for its immense size and architectural grandeur. Built over a period of nearly 150 years, its construction began in 1646 under the architect Daniel Gittard and continued under Jean-Nicolas Servandoni, who designed its impressive twin-towered façade. The church's unique architecture represents the spirit of the Counter-Reformation, and it remains one of Paris' largest churches, second only to Notre-Dame.

Inside the church, visitors can see the remarkable Delacroix murals in the Chapel of the Holy Angels, which includes masterpieces such as "Jacob Wrestling with the Angel." These works reflect the artist's genius and his deep understanding of biblical themes. The church also features organs of exceptional quality by Aristide Cavaillé-Coll, one of the most significant organ builders of the 19th century. The organ has been played by some of France's greatest musicians, including Charles-Marie Widor and Marcel Dupré.

The church has a long history of being a site for notable events. It is famous for the gnomon, a scientific device used for astronomical purposes, located inside the church. The Lady Chapel, with its intricate sculptures by artists like Bouchardon and Pigalle, further enhances the church's historical and artistic value. The church also gained popularity from its mention in Dan Brown's novel "The Da Vinci Code," making it a site of interest for both history enthusiasts and pop culture fans alike.