Prosper Graf zu Castell-Castell[Notes 1] (4 September 1920 – 3 January 1989) was a highly decorated Oberst in the Wehrmacht during World War II. He was also a recipient of the Knight's Cross of the Iron Cross. The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership. Prosper Graf zu Castell-Castell was captured by American forces in May 1945 and was released in late June 1945.
Scherzer, Veit (2007). Die Ritterkreuzträger 1939–1945 Die Inhaber des Ritterkreuzes des Eisernen Kreuzes 1939 von Heer, Luftwaffe, Kriegsmarine, Waffen-SS, Volkssturm sowie mit Deutschland verbündeter Streitkräfte nach den Unterlagen des Bundesarchives (in German). Jena, Germany: Scherzers Miltaer-Verlag. ISBN 978-3-938845-17-2.
Thomas, Franz and Wegmann, Günter (1998). Die Ritterkreuzträger der Deutschen Wehrmacht 1939–1945 Teil III: Infanterie Band 4: C–Dow (in German). Osnabrück, Germany: Biblio-Verlag. ISBN 3-7648-2534-0.
1 Knight's Cross with Panzer-Regiment 3 (2nd Panzer Division), Swords with the XXXIX. Panzerkorps2 Knight's Cross with Panzer-Regiment 23 3 Knight's Cross with Panzer-Aufklärungsabteilung 7, Oak Leaves with Kradschützen-Bataillon 64