Max von Oppenheim - Wikipedia
Germany's grand First World War jihad experiment
Curt Prüfer's Holy War. How German Interference Blew Up the…, by Kevin Morrow
Slave Girls and Pickled Heads: The Spectacular Life and Finds of Max von Oppenheim - DER SPIEGEL
Slave Girls and Pickled Heads: The Spectacular Life and Finds of Max von Oppenheim - DER SPIEGEL
Biography – Max von Oppenheim Stiftung
Rayyane Tabet
Meret Oppenheim, Object (Fur-covered cup, saucer, and spoon)
Max von Oppenheim - Wikipedia
Albert von Oppenheim - Wikidata
Max von Oppenheim: The little-known history of a German spy in the Gulf