Since September 2001, the German magazine Der Spiegel has financed the excavation of parts of the castle's cellar, which was carried out with the Kaliningrad Art History Museum.
Saksalainen lehti Der Spiegel on syyskuusta 2001 asti rahoittanut Kaliningradin taidehistoriamuseon suorittamia linnan kellarin kaivauksia.