House „O“ is situated on Silba island in Croatia. It replaced the original modest single-family house surrounded with thick vegetation. The house perfectly meets the requirements of its owners who intend to enjoy its cool interior and its sheltered courtyard. Areas of the house used by day and those used by night are placed on different floors and differ in character. All details of the house have been designed and selected by the architects so as to meet the needs and wishes of its occupants. The house is designed in accordance with the surrounding typology in an ambience dominated by Mediterranean light.