"Casa Batlló This building was designed by Antoni Gaudi and is one of the masterpieces of the Art Noveau architecture in Barcelona." I really want to see this place; it's such a piece of functional, beautiful art.
Art Nouveau Tour of Barcelona. This is Casa Batllo, designed by Gaudi. Spain was not drawn into WW I and as such during that time, had prosperity. As as result, there are over 400 Art Nouveau structures in Barcelona.