Château de Chinon is a castle located on the bank of the Vienne river in Chinon, France. It was founded by Theobald I, Count of Blois. In the 11th century the castle became the property of the counts of Anjou. In 1156 Henry II of England, a member of the House of Anjou, took the castle from his brother Geoffrey after Geoffrey had rebelled for a second time. Henry favoured the Château de Chinon as a residence. Most of the standing structure can be attributed to his reign and he died there in 1189.
Early in the 13th century, King Philip II of France harassed the English lands in France and in 1205 he captured Chinon after a siege that lasted several months, after which the castle remained under French control. When King Philip IV accused the Knights Templar of heresy during the first decade of the 14th century, several leading members of the order were imprisoned there.
Used by Charles VII in the 15th century, the Château de Chinon became a prison in the second half of the 16th century, but then fell out of use and was left to decay. It has been recognised as a monument historique by the French Ministry of Culture since 1840. The castle, which contains a museum, is now owned and managed by the Indre-et-Loire General Council and is a major tourist attraction. In the early 21st century it was restored at a cost of 14.5 million euros.
The settlement of Chinon is on the bank of the Vienne river about 10 kilometres (6 mi) from where it joins the Loire. From prehistoric times, when the settlement of Chinon originated, rivers formed the major trade routes, and the Vienne joins the fertile southern plains of the Poitou and the city of Limoges to the thoroughfare of the Loire. The site was fortified early on, and by the 5th century a Gallo-Roman castrum had been established.Theobald I, Count of Blois built the earliest known castle on the mount of Chinon in the 10th century. He fortified it for use as a stronghold. After Odo II, Count of Blois died in battle in 1037, Fulk III, Count of Anjou marched into Touraine to capture Château de Langeais and then Chinon, some 22 km (14 mi) away. When Fulk arrived at Chinon the castle's garrison immediately sought terms and surrendered. In 1044, Geoffrey (the count of Anjou) captured Theobald of Blois-Chartres. In exchange for his release, Theobald agreed to recognise Geoffrey's ownership of Chinon, Langeais, and Tours. From then until the early 13th century, Château de Chinon descended through his heirs.