The entrance to the KunstHausWien. On top of the building flies the Koru Flag[a], an alternative flag for New Zealand designed by Hundertwasser. It includes the spiral, one of Hundertwasser's trademark shapes (if not the trademark shape):
The spiral is where lifeless matter is transformed into life.
This water-spiral is found in the lobby. The water is pumped upwards along the spiral to fall from it's peak at the center. Similarly, the stairwell is built so that the spiralling stairs are centered above the water-spiral (although the stairs twist in the opposite direction going up).