Archaeologists uncover 640-year-old castle ruins beneath French mansion

Archaeologists discovered the 640-year-old ruins of the Château de l'Hermine, a medieval castle, beneath a private mansion in Vannes, France. The castle, built in the 1380s by Duke John IV of Brittany, was unearthed during excavations for a new museum. Archaeologists found the ducal residence, ornate facade, and various rooms. The discovery yielded well-preserved artifacts from the 15th and 16th centuries, including coins, jewelry, and cooking utensils, offering insights into daily life at the castle.