By the 19th century, Sentier was the center of the textile industry in France. It is now home to internet start-ups and hosts restaurants, galleries and boutiques, making it a dynamic hub for trendsetting businesses in Paris. The surprising changes in atmosphere that occur in certain neighborhoods, just by crossing a few sidewalks is one of the charms of Paris. We explore the 200-year-old Passage du Grand Cerf as well as a popular pastry shop that looks like an art museum and the amazing Opéra Comique.