The Calahorra tower (Torre de la Calahorra) is a fortified gate in the historic centre of Córdoba. The edifice is of Islamic origin. It was first erected by the Almohad Caliphate to protect the nearby Roman Bridge on the Guadalquivir. The tower, standing on the left bank of the river, originally consisted of an arched gate between two. A third tower was added to the existing ones, in the shape of two cylinder connecting them.
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.