Robert Julius Beyschlag was a German painter.
Robert Julius Beyschlag was born in Nördlingen on 1 July 1838. He studied at the Akademie der Bildenden Künste, Munich. He was a painter of mythological subjects, figures, and genre scenes. His works include: Nymphs; Conversation at the Well; Iphigenia's Farewell; The Parting of Orpheus and Eurydice; and studies of women's heads and figures from different centuries, which were published as collotypes in 1885 under the title Frauenlob. He also painted a fresco in the Bayerisches Nationalmuseum, Munich. He died in Munich on 15 December 1903, aged 65.