Visit Sainte-Chapelle between 2:00 PM and 4:00 PM on a clear afternoon

While Notre-Dame draws massive lines, 13th-century Sainte-Chapelle on Île de la Cité features 15-meter-high stained-glass panels enclosing 1,113 biblical scenes. Mid-afternoon sun streams through the southern lancets, bathing the upper Gothic sanctuary in a kaleidoscope of sapphire blue and ruby red light.