Casa Mila, La Pedrera popularly called , is a modernist building designed by the architect Antoni Gaudi, built between 1906 and 1910 in the Eixample district of Barcelona, at number 92 Paseo de Gracia .
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.