The Château de Loches is a castle located in the département of Indre-et-Loire in the Loire Valley in France; it was constructed in the 9th century. Built some 500 meters above the Indre River, the huge castle, famous mostly for its massive square keep, dominates the town of Loches.

Designed, built, and occupied by Henry II of England and his son, Richard the Lionheart during the 12th century, the castle withstood the assaults by the French king Philip II in their wars for control of France until it was finally captured by King Philippe in 1205. Construction work immediately upgraded Loches into a huge military fortress.

The castle would become a favorite residence of Charles VII of France who gave it to his mistress, Agnès Sorel, as her residence. It would be converted for use as a State prison by his son, King Louis XI who had lived there as a child but preferred the royal castle at Amboise.