The Louvre Saint-Honoré building is a historic structure in Paris, occupying an entire urban block between the rue de Rivoli (across the Louvre Palace), the place du Palais-Royal, the rue Saint-Honoré, and the rue de Marengo, with a total floor surface of 47,000 square meters. It was originally erected in the early 1850s by the Pereire brothers who in 1855 opened an iconic hotel, the Grand Hôtel du Louvre, and an innovative street-level department store, branded from 1863 the Grands Magasins du Louvre. While the Grand Hôtel closed in 1887, the Grands Magasins expanded and kept operating in the building until 1974. From 1978 to 2016 they were succeeded by a specialized mall of antiques shops, the Louvre des Antiquaires, while the upper floors were repurposed as rented office space. Since 2020, the building's lower levels have been undergoing conversion to become the new flagship home of the Fondation Cartier pour l'Art Contemporain.