The Chapel of Saint Louis is a small Roman Catholic chapel located within the grounds of the Palace of Versailles. It was built in 1682 and is dedicated to King Louis XIV, who commissioned it for his personal use. The chapel was designed by Jules Hardouin-Mansart, the chief architect of Versailles, and features a Baroque design with two levels and five bays. Its interior decoration includes several works by Charles Le Brun, including the frescoes on its walls and ceiling. The chapel’s most notable feature is its ornate altar made from marble imported from Italy. It also houses many religious artifacts belonging to Louis XIV, such as holy relics that were gifted to him by Pope Innocent XI in 1686.