Herderin met schapen, bij een viaduct (1869 - 1937) by Anton L Koster https://www.rawpixel.com/image/13791016/herderin-met-schapen-bij-een-viaduct-1869-1937-anton-kosterFree Image from public domain licenseGezicht op Maastricht (1869 - 1911) by Anton L Koster and Anton L Koster https://www.rawpixel.com/image/13765117/gezicht-maastricht-1869-1911-anton-koster-and-anton-kosterFree Image from public domain licenseLandschap met molens bij water (1869 - 1937) by Anton L Koster https://www.rawpixel.com/image/13790964/landschap-met-molens-bij-water-1869-1937-anton-kosterFree Image from public domain license