The Palmenhaus Schönbrunn is a large greenhouse in Vienna, Austria, featuring plants (about 4.500) from around the world. Linked by tunnel-like passages, the pavilions contain different climatic zones: a 'cold' house to the north, a temperate zone in the central pavilion and a tropical climate in the south pavilion. The Palmhaus was erected in 1881/2 to designs by Franz Xaver Segenschmid and the building was opened in 1882, under Franz Joseph I. One hundred and thirteen metres long, the Palm House consists of a 28-metre high central pavilion and two lateral pavilions which are three metres lower.