Court of the Bishop's Palace, Liege by Cundall and Fleming https://www.rawpixel.com/image/14323055/court-the-bishops-palace-liege-cundall-and-flemingFree Image from public domain licenseView down tree lined path towards palace by Société Royale Belge de Photographie https://www.rawpixel.com/image/14247768/photo-image-plant-person-grassFree Image from public domain licenseHistorical First World War battle sites around Liege, Belgium and Verdun, France. Original public domain image from Flickr https://www.rawpixel.com/image/4042497/photo-image-building-public-domainFree Image from public domain license