The Royal Mint (Real Casa de la Moneda) in Segovia was founded by Philip II and designed by Juan de Herrera. It now holds two museum spaces: the Museum of the Casa de la Moneda and the Aqueduct Interpretation Centre.
Located beside the Eresma River and the Alcázar palace, it is the oldest example of industrial architecture still existing in Spain. It operated as a Royal Mint between 1586 and 1869, and still conserves its hydraulic infrastructure intact, with a dam in the Eresma river. Part of the hydraulic system is on display in the outdoor courtyard, with a reproduction of the wooden channels and waterwheels which today, as in the 16th century, power the machinery.
The Château Comtal (Count’s Castle) is a medieval castle within the Cité of Carcassonne, the largest city in Europe with its city walls still intact. The Château Comtal has a strong claim to be called a 'Cathar Castle'. When the Catholic Crusader army arrived in 1209 they first attacked Raymond-Roger Trencavel's castrum at Bèziers and then moved on to his main stronghold at Carcassonne.
The castle with rectangular shape is separated from the city by a deep ditch and defended by two barbicans. There are six towers curtain walls.
The castle was restored in 1853 by the architect Eugène Viollet-le-Duc. It was added to the UNESCO list of World Heritage Sites in 1997.