Haus des Meeres, Vienna. Austria



Date Built
The flaktower was originally constructed between October 1943 and July 1944
Location
Esterhazy Park
Description
There are six World War II flak towers still standing in various locations around Vienna.  Flakturm L is located in Arenbergpark and today it is home to Haus des Meeres, literaly "House of the Sea", an aquarium housing over ten thousand aquatic beings in an area of around 4,000 square meters.  According to its Wikipedia page Haus des Meeres is, "... managed by Aqua Terra Zoo, a private non-profit organization which, according to its web site, receives only marginal financial support from municipal authorities. However, the maintenance costs for the former flak tower are paid by the taxpayer."



"The concrete tower, housing the present-day aquarium, was erected as a fire control flak tower in ten months between October 1943 and July 1944. The tower is 47 meters tall, with a footprint of 31 by 15 meters, and its gross volume, including extensive foundations, reaches 55,000 cubic meters.  In 1944 it was crowned with a Würzburg radar dome. In case of imminent air raid threat, the radar could be lowered into a concrete shaft with 3.5-meter thick concrete walls."





The aquarium's website says that, "... 8,500 green plants have been planted on a wall of the former flak tower in automatically irrigated tubs on an area of 400 m2 - up to a height of 35 meters. The hardy plants, some with different colors, will fill the 75-year-old gray concrete wall with life ….. “