An international tech entrepreneur with a fondness for architecture asks Rem Koolhaas to build a house on an impossibly small piece of mountainside in Zell am See in Austria. The architect of the celebrated book S,M,L,XL seizes the challenge: how to draw light into a house less than four metres wide that is mostly underground? Photographer and filmmaker Frans Parthesius followed the building process and offers insight into Koolhaas’s way... see more