Château Gaillard (French pronunciation: [ʃɑto ɡajaʁ]) is a medieval castle ruin overlooking the River Seine above the commune of Les Andelys, in the French department of Eure, in Normandy.It is located some 95 kilometres (59 mi) north-west of Paris and 40 kilometres (25 mi) from Rouen.Construction began in 1196 under the auspices of Richard the Lionheart, who was …