What significant event occurred in the building in 2009?
Reference
OpenAI's Answer
In 2009, a significant event that occurred in a building was the collapse of the Historisches Archiv der Stadt Köln (Historical Archives) in Cologne, Germany. This catastrophic incident took place on March 3, 2009, and resulted in the destruction of priceless historical documents and records.
For further details, you can refer to the summary provided by On This Day: Historisches Archiv der Stadt Köln Collapse.