Professor Joseph Krawina and Peter Pelikan built the Hundertwasserhaus, named for its generous designer. Friedensreich Hundertwasser made the plans for this lego-like structure free of charge, saying that he’d be honored to have a part in keeping an “ugly building” from taking up residence on the streets of Vienna. I’d say he’s done his part! One of the greatest things about Hundertwasserhaus is its vegetation. It sports a grass roof and the trees you see on the second and third stories are creeping outward from their roots inside the building. I was unable to find out if there are many (or any) current residents in the 52 apartments and 4 offices, but it seems like a cheerful place to live! Hopefully the interiors are as colorful and unique as the façade.