Two things happened in Barcelona. I got deeper respect for Gaudi, especially after visiting Casa Batlló. This is an absolute amazing building, finalized 100 years ago (built 1877 and remodelled in the years 1905–1907) it feels more modern than anything today.
The organic shape and reflection on human relation to nature (everything from ventilation to letting in the sun) make me think that this house should be seen as a role model for anyone building a house today. I believe that that the buildings (and especially those we live in) can be turned from the worst threat to the planet to the main driver that can deliver a resource efficient society. The question is where we will find the Gaudi of the 21st Century and those willing to pay for it?
The picture is from within Casa Batlló and shows a window that let sunshine in.