View of the Weissenstein Near Cassel by Franz Ludwig Catel https://www.rawpixel.com/image/8985679/view-the-weissenstein-near-cassel-franz-ludwig-catelFree Image from public domain licenseView of the Church of San Pancrazio, Rome, from the South by Franz Ludwig Catel https://www.rawpixel.com/image/9185723/image-berlin-germany-painting-1834Free Image from public domain license