Boulevard Saint-Germain is a famous street located in the Saint-Germain-des-Prés area of Paris, France. Known for its vibrant atmosphere, it is lined with cafes, shops, and historic buildings. The boulevard has been a cultural hub for artists, writers, and intellectuals, particularly during the Existentialist movement in the mid-20th century. The boulevard stretches approximately 2.5 kilometers and connects the Latin Quarter to the Place de l'Odéon. It features iconic landmarks such as the Église de Saint-Germain-des-Prés and the Café de Flore, which have been frequented by notable figures like Jean-Paul Sartre and Simone de Beauvoir.