Chateau de Chambord is a large chateau located in the Loire Valley of France. It is considered one of the most beautiful and iconic examples of French Renaissance architecture and is one of the largest chateaux in the country. Built by King Francis I between 1519 and 1547, it was designed as a hunting lodge and was used for grand hunts and lavish parties. It was later used as a royal palace, a prison, and even a barracks during the French Revolution. Today, it is one of the most popular tourist attractions in France, attracting over a million visitors each year. The chateau is known for its elaborate architecture, including its distinctive double-helix staircase, its many towers and turrets, and its ornate roofline. The interior of the chateau is also noteworthy, with its many sumptuous rooms, including the King's Apartments, the Hall of Mirrors, and the Grand Gallery. The Chateau de Chambord is surrounded by a large park and is located in the heart of the Loire Valley, a region that is home to many other historic and cultural sites.