Briefkaart aan Jan Ponstijn (1918) by Leo Gestel and Leo Gestel https://www.rawpixel.com/image/13743698/briefkaart-aan-jan-ponstijn-1918-leo-gestel-and-leo-gestelFree Image from public domain licenseAllegorie op de wedergeboorte van kunst na de Eerste Wereldoorlog (c. 1917) by Charles Haslewood Shannon https://www.rawpixel.com/image/13734649/image-paper-angel-faceFree Image from public domain licenseAllegorie op de wedergeboorte van kunst na de Eerste Wereldoorlog (1917) by Charles Haslewood Shannon https://www.rawpixel.com/image/13764667/image-paper-angel-faceFree Image from public domain licenseTheater van oorlog en vrede, 1599 (1599) by Pieter van der Borcht I and Johannes Moretus I https://www.rawpixel.com/image/13748133/image-dog-paper-personFree Image from public domain licenseDecoratie op de Keizersgracht bij de Leidsestraat, 1816 (1816) by anonymous https://www.rawpixel.com/image/13781898/decoratie-keizersgracht-bij-leidsestraat-1816-1816-anonymousFree Image from public domain license