Bloemenstudie van Papavers en Rhododendrons (1872 - 1950) by Barbara Elisabeth van Houten https://www.rawpixel.com/image/13734426/image-paper-rose-faceFree Image from public domain licenseBloemenstudies in paars en roze (1874 - 1945) by Carel Adolph Lion Cachet https://www.rawpixel.com/image/13793683/bloemenstudies-paars-roze-1874-1945-carel-adolph-lion-cachetFree Image from public domain license