The work is set against the backdrop of the duplication of the Portal IV of the historic Berlin Palace, which is a result of its repeated reconstruction: Once through the reconstruction as a spoil for the entrance of the State Council building (Staatsratsgebäude) of the GDR and currently as part of the reconstructed Berlin Palace. For this reason, the Portal IV now exists three times if viewed independently of time: As a destroyed original and in the form of the two reconstructions.