The Château d'Étampes was a castle in the town of Étampes. The principal remains are of the 12th-century keep, the Tour de Guinette.
The Château d'Étampes was an early 10th-century stronghold of Robert the Pious, King of France, that comprised both a palace proper and motte. Between 1130 and 1150, a new castle was created overlooking the valley, culminating in a strong keep or donjon: the present Tour de Guinette. The Château was extended under later kings, notably Philip II of France, but suffered through sieges in the Hundred Years War before having been ordered destroyed by Henry IV of France, after which only the keep remained.
The architectural aspects of this former royal castle are known from contemporary images, including the Très Riches Heures du duc de Berry. Tour de Guinette was in the center of the castle and was surrounded by a rectangular curtain wall punctuated by corner towers. This wall was, in turn, enclosed by two additional walls providing layers of defense for the keep.
The surviving keep stands roughly 27 meters tall and is a quatrefoil plan (much like a four-leaf clover). Divided into four stories, first-floor access may originally have been reached from the enclosure wall. This interesting plan is the result of tactical experimentation that the keep underwent during the mid-12th century to improve the defense of towers against missiles and to reduce dead ground. The circular lobes deflect missiles, and allow defenders to cover the foot of the walls from the summit of the keep. The plan resembles the keeps of Ambleny and nearby Houdan. Clifford's Tower, part of York Castle in York, England, is believed to have been inspired by Étampes.
References:The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.