What makes Royal Palace of Madrid historically important?
Built on the site of a 9th-century Moorish fortress, the Palacio Real was constructed 1738-1755 by King Philip V. With 3,418 rooms covering 135,000 square meters, it's the largest functioning royal palace in Europe. Though the royal family now lives elsewhere, the palace hosts state ceremonies and is open to visitors who can explore opulent throne rooms, royal armory, and stunning art collections.