. "Carl Hermann Friedrich Johann Hopf"@en . . . . . "German historian" . . "1873-08-23Z"^^ . "1832-02-19Z"^^ . . "Karl Hopf (Hamm, Westphalia, February 19, 1832 \u2013 Wiesbaden, August 23, 1873) or Carl Hermann Friedrich Johann Hopf was historian and expert in Medieval Greece, both Byzantine and Frankish."@en . "1873Z"^^ . "Hopf, Karl"@en . "1832Z"^^ . "Karl Hopf"@en . .