"Kathedreal-Ruine zu Tyrus von Aussen" - Photo of the ruins of the Crusader Cathedral in Tyre/Sour, where the bones of Holy Roman Emperor Frederick Barbarossa were supposedly buried, taken by German explorer Johann Nepomuk Sepp and published in his 1879 book, scanned from a copy at the Staatsbibliothek zu Berlin – Preußischer Kulturbesitz (Berlin State Library – Prussian Cultural Heritage)
Johann Nepomuk Sepp (*7 August 1816 – + 5 June 1909)
CC BY-SA 4.0
Sepp, Johann Nepomuk: Meerfahrt nach Tyros zur Ausgrabung der Kathedrale mit Barbarossa’s Grab, Leipzig 1879. [Verlag von E.A. Seemann]