Create an art therapy coloring page of Paris, with famous landmarks like the Eiffel Tower, Notre-Dame, and street cafés, in a detailed hand-drawn style. Each section of the illustration should include a small letter (A, B, C...) to indicate the recommended color. For example: A = blue, B = green, C = yellow, D = red, E = grey. The overall design should be relaxing, highly detailed, and suitable for adult art therapy."