Siggen Manor is situated right on the Baltic Sea, close to the city of Oldenburg in Schleswig-Holstein. Since 1933 it is in possession of the “Alfred Toepfer Stiftung”, a foundation active in arts and culture, science, nature conservation and educational programmes. The single-storey tutorial building erected for the foundation is a transparent structure which blends into the mature tree-population. The pavilion rests on a ferro-concrete slab with a strip footing as raft foundation, the buttressing core consists of reinforced concrete. Resting on slim pillars, the point-supported roof is made of wood-based structural members called “Dickholz”, which allows for an all around transparent, airy facade and a wide roof projection without thermal bridges. The maximum span of the 35 cm thick, solid wooden panel is approximately 9m. Due to the industrial prefabrication of the timber elements the roof could be installed within a very short building period of just a few days and the interior work could be started right after the roof had been mounted.