The Royal Palace in Amsterdam (originally the town hall) was restored during 2005-2011. The restoration work was qualified as a state secret, which means that many architectural historical data are still not publicly available and that the local Department of Monuments of the city of Amsterdam does not have access to them either. The restoration consisted of several elements. 1. The renovation of the palace and its technical systems. In 2006, one third of the Imperial staircase was removed to make room for a lift. This had a severe impact on the monumental value of the staircase and it received a lot of attention in the national media, with many arguing that the staircase should be saved. 2. Initially, no funds were available for restoring ...