A myriad of changing light and colour moods on the Bodensee,sunrise in the bedroom, sunset on the loggia.For Heiko Ostman, architecture means the art of filling aroom with light. While designing his combined living andwork space above the Untersee, in Swiss Ermatingen, hehas turned his philosophy into a highly impressive reality.The massive body of the upper floor seems to hover onslender angled steel supports. The view from the kitchenthrough the full length sliding doors is simply spectacular:meadow and lake seemingly merge into one, creating thesense of boundless space and a oneness with nature.