Spewing twin columns of fire from the solid rocket boosters as space shuttle Discovery roars into the blue Florida sky toward… Free Photo from public domain license 
Hollyhock from Poets in the Garden published by T. Fisher Unwin (1886). Original from the British Library. Digitally enhanced… Free Image from public domain license 
A vase with flowers by Johan Teyler (1648-1709). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Letter with flower wreath and landscape with farm and animals (1829–1880) by Jos. Scholz. Original from The… Free Image from public domain license