Entering the arcade from the Arc de Triomphe on the side of Milan Cathedral, you will be greeted by a marble-covered promenade with a mosaic of colours that symbolize Italy's unity and confidence. Many places in the arcade have obvious representations of the cities of Italy, such as the bulls of Turin, the wolf of Rome, the lily of Florence, the red cross of Milan on the white. It's the most subtle is the glass dome at the top, and the shopping is too tired to look up and another wonderful view. The corridors of the two glass vaults meet in the central octagonal space, with a glass dome above. The top of this gallery is covered with arched stained glass and cast iron roofs, and is also popular in the 19th century. Sunlight shines through the glass roof, illuminating the delicate reliefs and murals underneath, with a radiant golden glow.