Bridges and viaducts are not only engineering solutions, ensuring the possibility to overcome obstacles and communication – they are also a spatial elements, visible in the city landscape. For centuries, it was attempted to give the bridges an interesting shape; they were sometimes specific gates to the cities, too – the example here can be the famous bridge in Avignon. Also today they are the expression of styles and trends in architecture, often designed by renowned artists. Additionally, bridges increasingly often become the spatial dominants, constructions clearly silhouetted against the greenery or urban tissue, the contemporary symbols of the cities. Santiago Calatrava, one of the leading Spanish architects and designer of, among othe...