Santiago Calatrava: finding architecture's soul

The renowned Spanish architect Santiago Calatrava has been speaking to euronews. His designs - which take their inspiration from nature - provoke strong reactions; they are either loved or loathed. Calatrava, who considers himself to be above all an artist, says an architect is also a philanthropist. In the past cities were designed to last, today they provide an insight into the soul of the lost civilisations that built them. So, if architecture is the most tangible sign of a civilisation how then to preserve the sacred nature of a location?