The Château de Blois is one of the main castles of the Loire Valley; the city from which it takes its name, Blois, is the capital of the French department of Loir-et-Cher and is located along the side of a hill on the right bank of the Loire. It has been the residence of numerous sovereigns of France and Joan of Arc was blessed there by the Archbishop of Reims before the expedition intended to liberate besieged Orléans. The royal castle of Blois gathers around a single courtyard a review of French architecture from the Middle Ages to the classical period, which makes it a very important building for understanding the evolution of architecture over the centuries.