A vivarium is a small facility for keeping terrestrial and aquatic animals. The Vivarium humanicum ingens consists of 36 glass segments ("x") surrounding a dormitory. The glass segments are arranged in such a way that the keep the bushes growing uninhibitedly behind them in check towards the street and the same time this combination turns outward like a fortress. Roots grow upwards, the glass is maltreated by the plants, weather conditions and people who leave their mark on it. The people living behind this naturally constructed wall cannot be seen, disappearing into the thicket of the vivarium wall.