Snow falling onto a building in the city with gray skies. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3293199/free-photo-image-rain-and-clouds-aerial-view-apartment-buildingFree Image from public domain licenseA music teacher surrounded by his female pupils, in a studio setting in Sophia. Photograph, 1904. https://www.rawpixel.com/image/14004813/photo-image-person-music-clothingFree Image from public domain licenseNASA Dryden Flight Research Center's two T-38A Talon mission support aircraft flew together for the first time on Sept 26th… https://www.rawpixel.com/image/440690/free-photo-image-army-air-force-aircraftFree Image from public domain licenseGezicht op de Hagia Sophia in Istanboel (1888 - 1900) by Sébah and Joaillier https://www.rawpixel.com/image/13756857/gezicht-hagia-sophia-istanboel-1888-1900-sebah-and-joaillierFree Image from public domain licenseAlberto Fortis. Line engraving by G. Fusinati after Sofia Sellier. https://www.rawpixel.com/image/13998790/alberto-fortis-line-engraving-fusinati-after-sofia-sellierFree Image from public domain licenseMaria Sophie of Bavaria by Franck François Marie Louis Alexandre Gobinet de Villecholles and Justin Lallier https://www.rawpixel.com/image/14325725/image-face-person-artFree Image from public domain licenseMadame la comtesse de Morny by André Adolphe Eugène Disdéri https://www.rawpixel.com/image/14315368/madame-comtesse-morny-andre-adolphe-eugene-disderiFree Image from public domain licenseAgriculture Secretary Sonny Perdue visiting the Dona Sofia Polo Ranch in San Antonio de Areco, Argentina on July 29, 2018. https://www.rawpixel.com/image/3260571/free-photo-image-andalusian-horse-animal-apparelFree Image from public domain licenseAlberto Fortis. Line engraving by G. Fusinati after Sofia Sellier. https://www.rawpixel.com/image/13985977/alberto-fortis-line-engraving-fusinati-after-sofia-sellierFree Image from public domain licenseAya Sophia, Istanbul, Turkey. Photograph by Guillaume Berggren, ca. 1880. https://www.rawpixel.com/image/14017794/aya-sophia-istanbul-turkey-photograph-guillaume-berggren-ca-1880Free Image from public domain licenseThe Pietà with Christ's Sacred Heart appearing on his chest. Engraving. https://www.rawpixel.com/image/13993989/the-pieta-with-christs-sacred-heart-appearing-his-chest-engravingFree Image from public domain licenseSOFIA - Stratospheric Observatory For Infrared Astronomy.Original public domain image from Flickr https://www.rawpixel.com/image/8753858/photo-image-public-domain-computerFree Image from public domain licenseAgriculture Secretary Sonny Perdue visiting the Dona Sofia Polo Ranch in San Antonio de Areco, Argentina on July 29, 2018. https://www.rawpixel.com/image/3260562/free-photo-image-andalusian-horse-animal-argentinaFree Image from public domain licenseAirplane isolated image https://www.rawpixel.com/image/11409010/airplane-isolated-imageView license