The Château de Falaise rises above the Norman town traditionally identified as the birthplace of William the Conqueror. A fortified residence existed on the rocky spur by the early eleventh century, when William was born to Duke Robert I of Normandy and Herleva around 1028. The surviving castle, however, is mostly later. Its principal stone keeps were built and rebuilt by William's descendants and rivals, making the monument a record of twelfth- and thirteenth-century ducal and royal power.

The large rectangular keep is commonly associated with Henry I of England, William's youngest son. A second, more domestic keep and later cylindrical Talbot Tower expanded the stronghold as Normandy became contested between English and French rulers. Halls, chambers, chapels, kitchens, stores, walls, gates, and service yards supported administration and residence as well as defense. Soldiers, servants, builders, craftspeople, clerks, prisoners, horses, and suppliers kept the fortress functioning beyond the famous dukes named in chronicles.

Falaise changed hands during wars between the Plantagenet and Capetian monarchies. Philip II of France captured it in 1204 as Normandy was absorbed into the French royal domain. The castle remained strategically important during the Hundred Years' War and suffered siege and occupation. Artillery altered defensive needs, while later governments used or neglected parts of the complex. By the modern era, roofs and interiors had vanished and the masonry required repeated stabilization.

Nineteenth- and twentieth-century preservation saved major towers but also introduced repairs shaped by contemporary ideas of medieval architecture. Severe damage to Falaise during the 1944 Normandy campaign affected the town and castle setting. Late twentieth-century restoration added a modern entrance and interpretive interiors. Digital tablets, projected scenes, reconstructed furnishings, and augmented views help explain lost spaces but are contemporary interpretation. They should not be mistaken for original rooms or direct visual records of William's childhood.

Falaise is significant because Norman dynastic memory, medieval military architecture, cross-Channel monarchy, and modern reconstruction converge on one dramatic site. Interpretation should state that William's birthplace association belongs to an earlier residence beneath or near the later keeps. Conservation must protect fractured stone, archaeological deposits, repaired roofs, wartime scars, and modern additions. The castle's layered fabric is more historically valuable than a simplified Conqueror narrative: it shows how successive rulers repeatedly reshaped a strategic stronghold and how modern technology now reconstructs spaces that no longer survive. The surrounding town and cliff approaches remain part of that defensive and commemorative landscape.