The Castle can be visited
Château de Langeais

The Château de Langeais is a castle in the town of the same name on the banks of the Loire in France. It is characterized by its well-preserved architecture, which reflects both medieval defensiveness and the style of the early Renaissance.
History+
Parts of the keep, one of the first stone towers, remain from the original fortress, which was built in an effort by the Count of Anjou to secure territories of the Counts of Blois and Tours. During the Hundred Years' War, the castle fell into English hands and was razed in 1428, except for the keep. The current castle was built from 1465 below the old fortress to protect the royal domain. Jean Bourré, an advisor to Louis XI, oversaw the construction on behalf of the king. A historical event was the marriage of Charles VIII to Anne de Bretagne in 1491, which had consequences for the union of Brittany with France.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Hervé Rebours
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 47.3246, 0.4061