Operation Carthage, on 21 March 1945, was a controversial British air raid on Copenhagen, Denmark, during the Second World War. The target of the raid was the Shellhus, Gestapo headquarters, in the city centre, a building that had been used for the storage of dossiers and the torture of Danish citizens.
By mistake they also bombed The French School in nearby Frederiksberg.
http://da.wikipedia.org/wiki/Fil:Shellhuset_from_KB.jpg