A major street in Paris on the Left Bank (south side) of the Seine river. It crosses the Saint-Germaine-des-Prés quarter, where the church of Saint-Germaine-des-Prés (dating back to the Middle Ages) is located, which gives the street its name. American expatriate writer Ernest Hemingway was an habitué of Saint-Germaine-des-Prés.
After the 1930s, the boulevard became known for its nightlife, cafés, and students. It is home to several famous Parisian cafés, such as Les Deux Magots and Café de Flore, where thinkers of the French existentialist movement such as Jean-Paul Sartre and Simone de Beauvoir hung out.