Gezicht op Koblenz en Ehrenbreitstein (1832 - 1872) by Rudolf Bodmer, Adolf Lasinsky and Karl Baedeker https://www.rawpixel.com/image/13778449/image-paper-frame-personFree Image from public domain license
Gezicht op Trier (1829 - 1880) by anonymous and firma Joseph Scholz https://www.rawpixel.com/image/13775510/gezicht-trier-1829-1880-anonymous-and-firma-joseph-scholzFree Image from public domain license