A triangle shaped wooden background texture pattern at the Shanghai Performing Arts Center. Original public domain image… https://www.rawpixel.com/image/3305646/free-photo-image-background-wood-texture-wooden-floorFree Image from public domain licenseI Saw the Figure 5 in Gold (1928) painting in high resolution by Charles Demuth. Original from The MET Museum. Digitally… https://www.rawpixel.com/image/3037694/free-illustration-image-painting-modern-artFree Image from public domain licenseAfter Sir Christopher Wren (1920) painting in high resolution by Charles Demuth. Original from The MET Museum. Digitally… https://www.rawpixel.com/image/3037239/free-illustration-image-painting-church-modern-artFree Image from public domain licenseThe edge of a building facade with glass plates on it in Madrid. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3282433/free-photo-image-office-building-backgroundFree Image from public domain licensePiano Mover's Holiday (1919) painting in high resolution by Charles Demuth. Original from The Barnes Foundation. Digitally… https://www.rawpixel.com/image/3035962/free-illustration-image-cubism-painting-modern-artFree Image from public domain licenseCompass png clipart mathematical tool on transparent background. Free public domain CC0 graphic https://www.rawpixel.com/image/6258131/png-sticker-vintageFree PNG from public domain licenseMachinery (1920) painting in high resolution by Charles Demuth. Original from The MET Museum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/3036064/free-illustration-image-modern-art-public-domain-artworkFree Image from public domain licenseFree spiral stairways from a low angle image, public domain architecture CC0 photo. https://www.rawpixel.com/image/5917686/image-light-public-domain-shadowsFree Image from public domain licenseThe top edge of a gray building facade. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3286734/free-photo-image-minimal-architecture-modernFree Image from public domain licenseCorner of the Garden, Alcazar, Sevilla by Joaquín Sorolla y Bastida https://www.rawpixel.com/image/14263428/corner-the-garden-alcazar-sevilla-joaquin-sorolla-bastidaFree Image from public domain licenseGlass panels in the modern facade of a building in Madrid. 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Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3286377/free-photo-image-bridge-adventure-amusement-parkFree Image from public domain licenseConstruction of Dials (1809) from the book by John Wilkes (1725-1797), time measurement chart shown in geometric charts and… https://www.rawpixel.com/image/428202/dial-construction-guideFree Image from public domain licenseSchool and family charts, accompanied by a manual of object lessons and elementary instruction, by Marcius Willson and N.A.… https://www.rawpixel.com/image/7687828/image-vintage-poster-school-and-family-charts-chartFree Image from public domain licenseMasts (1919) painting in high resolution by Charles Demuth. Original from The Barnes Foundation. Digitally enhanced by… https://www.rawpixel.com/image/3036067/free-illustration-image-ship-modern-art-buildingFree Image from public domain licenseRooftops and Trees (1918) painting in high resolution by Charles Demuth. 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