"A world full of colour", says Friedensreich Hundertwasser, "is synonymous with paradise", a maxim that characterises the whole of the artist's architectural work. Goodbye to functional building, Hundertwasser stands for organic ways of living, with colours and shapes tuned to the natural and the human. "Straight lines", he says, "are utterly alien to human beings, to life, and to the whole of creation". Since beginning his artistic career in the 50s, Hundertwasser has been preoccupied with architecture in his painting. In the early 70s he designed his first architectural models and facades. Success vindicated his vision. With greenery on the rooftops, irregularly positioned windows, gilded turrets and not a straight line in sight, Hundertwasser's architecture is unmistakable. This first catalogue raisonne of Hundertwasser's architecture examines all his buildings and projects, whether realized or not, tracing them from the first sketches, through the models, to...