The Royal Castle in Warsaw, Poland was bombed by the Nazis on the 17th of September, 1939, at the beginning of the Second World War.
While some attempts were made to save parts of the building, in the weeks that followed Adolf Hitler gave German soldiers orders to demolish the building.
In early October plans were made to blow the castle up, and the interior was dismantled and treasures were either put in storage or seized by Nazi dignitaries.
The destruction of the castle was part of the Pabst Plan, to rebuild Warsaw as a model city for the Nazis.