The author died in 1914, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.
{{Information |Description={{en|1=Braunschweig. Corps des Herzogs von Braunschweig-Öls. 1809}} {{de|1=Knötel, Band I, tafel 32: Braunschweig. Corps des Herzogs von Braunschweig-Öls. 1809}} |Source=Richard Knötel ((* 12. Januar 1857, † 26. April 1914