Belintseva, Irina V. “The Palaces of East Prussia (Kaliningrad Region) from the Collection of Alexander Duncker in the Archives of the Herder-Institute in Marburg”. Actual Problems of Theory and History of Art 8 (October 11, 2018): 110–119. Accessed March 13, 2025. https://publ.actual-art.org/aptha/article/view/10631.