The Austrian House, designed by the renowned architect and founder of Office of Metropolitan Architecture (OMA) Rem Koolhass, is located on a minuscule 40-foot-wide (12 meters) sloping site by the Zeller See, or Lake Zell, in the Alps of Austria. Text description provided by the architect. I met the client at a digital conference in Munich – he asked us to design a house on a very narrow and steep site next to his sister’s house in Zell am Zee, the village where he had grown up.