Prince Sixtus Of Bourbon-Parma. Photograph. 1914. [Getty Images]

Prince Sixtus of Bourbon-Parma. Photograph. 1914. (Photo by Austrian Archives/Imagno/Getty Images) — see more

Prince Sixtus of Bourbon-Parma. Photograph. 1914. (Photo by Austrian Archives/Imagno/Getty Images)

Hulton Archive Imagno