Paul Klee's Baum und Architektur–Rhythmen (Tree and Architecture–Rhythms) (1920) https://www.rawpixel.com/image/8229353/image-art-vintage-public-domainFree Image from public domain licenseBaum und Architektur–Rhythmen (Tree and Architecture–Rhythms) (1920) by Paul Klee. Original portrait painting… https://www.rawpixel.com/image/2988859/free-illustration-image-paul-klee-abstract-paintingFree Image from public domain license