Architect Ernest Delune designed this head-turning house specifically for Gruner Sterner, a Viennese stained glass master. Sterner wasn't just the client, he got his hands dirty too, creating the gorgeous stained glass on the door and facade. And it gets better - Sterner had his own studio at the top of the house, where he designed stunning Art Nouveau windows for several of Delune's creations in the neighborhood. This project sounds like a true artistic collaboration.