"Residential House O" is a house in Novi Pazar, Serbia. It is located in Lug not far from the city center. The house is designed for a family living and working in Germany and serves as a seasonal holiday home. The main idea and motif of the house are Brisole-shaped pillars that create a play of shadows and thus allow the intimacy of the family when sitting on the porch in front of the house, while these same pillars also protect them from the sun's rays.