Orsay Museum and Saint-Germain

Begin your morning inside the soaring glass-vaulted hall of the Musée d'Orsay, where the world's richest collection of Impressionist paintings — Monet's water lilies, Renoir's dancing couples, Van Gogh's swirling starry skies — fills a former railway station from the 1900 World's Fair. After immersing yourself in 19th-century masterpieces, step onto the Pont des Arts for a pause above the Seine, with views stretching from the Louvre to Notre-Dame. Cross into the Left Bank and discover the Church of Saint-Germain-des-Prés, Paris's oldest church dating to 543 AD, where recently restored medieval frescoes glow beneath a star-painted vault. From there, wander the cobblestone lanes of the Saint-Germain-des-Prés quarter — past Café de Flore where Sartre once wrote, through gallery-lined Rue de Seine, and along streets still humming with the literary spirit of the Left Bank. End your day at Saint-Sulpice, where Delacroix's monumental murals fill the Chapel of the Holy Angels and a Cavaillé-Coll organ with over 6,500 pipes resonates through the nave. The Musée d'Orsay is closed on Mondays; booking tickets online in advance significantly reduces waiting time.