Photo de stock - 27 August 2019, Austria, Wien: The window frames and walls inside the new ""Hoho Wien"", a high-rise building consisting of 75 percent wooden parts from the first floor upwards and located in the seaside town in the northeast of the Austrian capital. The special is not visible from the outside. With its slabs, the facade of the high-rise building in Vienna looks rather conventional. But about 800 wooden columns made of Austrian spruce carry the floors, the wall elements are made of the renewable raw material and also the wood composite ceiling. With an area of almost 20,000 square metres, it is a wood-reinforced concrete hybrid house that is unparalleled in this dimension, according to master builder, engineer and project developer Palfy. Photo: Michael Baumgartner/Kito Photography/dpa - only for use in accordance with contractual agreement. - Wien/Austria