In the 1800s, there were 137 glass-roofed shopping arcades (passages) in Paris. Only 24 remain. The oldest, dating back to 1800, is Passage des Panoramas, 11 blvd. Montmartre (known for its stamps). Nearby are Passage Verdeau, 4-6 rue de la Grange Batelière, and Passage Jouffroy, 12 blvd. Montmartre. Info: 2nd/Métro Grands Boulevards
Passages are luminous and practical. The glass roofs not only admit light, but shelter shoppers from rain.
My favorite passage is in the Passage du Grand Cerf in the 2nd near rue Montorgueil (pictured here). For more information, check out http://www.passagedugrandcerf.com