Incidentally, the nickname among the people of Cologne is "Henkelmännchen", which results from their form or was derived.
The first cut of the spade, so the construction began on 31.07.1996 . Thousands of tons of concrete, parquet and plastic flooring were used from then on. The construction costs were at incredible 153 million euros! By the way, the responsible architect was Peter Böhm. At the opening, the arena had even another (third) name! Here is the process of naming: