The American Cyclopædia — Charles I.…
“ He is a son of Prince Anthony of Hohenzollern, and a brother of Prince Leopold, who was proposed for the Spanish throne in 1870, and belongs to a junior and mediatized branch of the Prussian royal family. He was educated in Dresden, entered the Prussian army in 1857, and served during the Schleswig-Holstein campaign in 1864. ”
