Answer:Materials. The central dome is built with bricks laid on edge and thick mortar beds for added lightness. Colored marble, porphyry and basalt columns that divide up the ships and painted cover their walls, which help to generate an ethereal glow iridescent inside the enclosure.
Switzerland was not a member of the Allied forced during World War I. They instead managed to remain a neutral power. They were neutral during World War II as well.
