Optics: various microscopes. Coloured engraving by J. Pass, 1820. https://www.rawpixel.com/image/13960298/optics-various-microscopes-coloured-engraving-pass-1820 Free Image from public domain license
Lance Cpl. John Cavender (left) and Lance Cpl. Matthew Daily (right) shoot an M252 81mm medium weight mortar system Aug. 13… https://www.rawpixel.com/image/3317664/free-photo-image-american-army-cannon Free Image from public domain license
Laying a cable on the Atlantic seabed: the crew of the Great Eastern launching a buoy in an attempt to retrieve a lost… https://www.rawpixel.com/image/13955515/image-person-art-water Free Image from public domain license
Sleek telescope peers through a chainlink fence over the city. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3305435/free-photo-image-cc0-creative-commons Free Image from public domain license
Seventy-one shots rang out during the Presidio of Monterey's annual Salute to the Nation, July 3, 2019. https://www.rawpixel.com/image/4040208/photo-image-public-domain-people-women Free Image from public domain license
PNG Astronomy astronomy white background technology. https://www.rawpixel.com/image/13501838/png-astronomy-astronomy-white-background-technology View license
Tank military vehicle weapon. AI generated Image by rawpixel. https://www.rawpixel.com/image/12351877/photo-image-sky-sand-blue View license
PNG Mortar white background earthenware terracotta. AI generated Image by rawpixel. https://www.rawpixel.com/image/12227300/png-white-background View license
PNG Astronomy astronomy white background binoculars. https://www.rawpixel.com/image/13500985/png-astronomy-astronomy-white-background-binoculars View license
PNG Telescope science white background technology. AI generated Image by rawpixel. https://www.rawpixel.com/image/12143198/png-white-background View license
PNG Telescope binoculars technology astronomy. AI generated Image by rawpixel. https://www.rawpixel.com/image/12212133/png-white-background View license
Telescope white background binoculars technology. AI generated Image by rawpixel. https://www.rawpixel.com/image/12238591/image-white-background-space View license
Cannons sit near the historical site of defensive positions from the first day of the Battle of Gettysburg in Gettysburg… https://www.rawpixel.com/image/8732354/photo-image-public-domain-history Free Image from public domain license
PNG Tank military vehicle transportation. https://www.rawpixel.com/image/14353288/png-tank-military-vehicle-transportation View license
Gun recovered from a ship wreck https://www.rawpixel.com/image/573231/cannon-from-wreck View license
Film fest poster template https://www.rawpixel.com/image/14874673/film-fest-poster-template View license
Blackware Handle Spout Vessel with Relief of a Reclining Musician with Pipes by Moche https://www.rawpixel.com/image/8941548/photo-image-person-art-craft Free Image from public domain license
Puerto Rico poster template, vintage design https://www.rawpixel.com/image/14805151/puerto-rico-poster-template-vintage-design View license
Final Frontier Instagram post template https://www.rawpixel.com/image/14804451/final-frontier-instagram-post-template View license
Rebel Works in Front of Atlanta, GA, No. 3 by George N. Barnard https://www.rawpixel.com/image/8965977/rebel-works-front-atlanta-ga-no-george-barnard Free Image from public domain license
Mortar Batteries in front of Picquet House, Light Division by Roger Fenton https://www.rawpixel.com/image/9029212/mortar-batteries-front-picquet-house-light-division-roger-fenton Free Image from public domain license
Bowl in the Shape of Underwater Serpent with Upturned Neck and Coiled Tail by Mississippian https://www.rawpixel.com/image/8941039/photo-image-americas-shape-underwater Free Image from public domain license
Science Museum transportation telescope aircraft. https://www.rawpixel.com/image/14860915/science-museum-transportation-telescope-aircraft View license
Cannon Beach, Oregon, United States https://www.rawpixel.com/image/434722/free-photo-image-beach-sea-sand View license
A floral fantasy of animals and birds (Waq-waq), early 1600s. India, Mughal. Opaque watercolor and gold on paper; page: 37.6… https://www.rawpixel.com/image/7665319/image-paper-plant-watercolor Free Image from public domain license
Ringling Bros. World's Greatest Shows: Madam Ada Castello. Daring Madam Castello's amazing exploits on the equine marvel… https://www.rawpixel.com/image/7665672/image-paper-art-vintage Free Image from public domain license
Pirate ship png sticker, vehicle illustration on transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6535626/png-sticker-public-domain Free PNG from public domain license
PNG Wagon wooden photo vehicle https://www.rawpixel.com/image/12652256/png-wagon-wooden-photo-vehicle-generated-image-rawpixel View license
PNG Telescope white background technology astronomy. AI generated Image by rawpixel. https://www.rawpixel.com/image/12226839/png-white-background View license
PNG Tank transportation bulldozer military. https://www.rawpixel.com/image/14734269/png-tank-transportation-bulldozer-military View license
PNG Telescope white background technology astronomy https://www.rawpixel.com/image/12546822/png-white-background View license
Cannon weapon png sticker illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6653970/png-sticker-public-domain Free PNG from public domain license
PNG Telescope telescope white background technology. AI generated Image by rawpixel. https://www.rawpixel.com/image/12881777/png-white-background-galaxy View license
PNG Wheel spoke transportation architecture. AI generated Image by rawpixel. https://www.rawpixel.com/image/12470213/png-wheel-spoke-transportation-architecture-generated-image-rawpixel View license
An Iraqi security forces member faces away and protects his ears from the blast of a 120mm mortar during training at the… https://www.rawpixel.com/image/3317657/free-photo-image-american-army-bazooka Free Image from public domain license
PNG Vintage of gun weaponry firearm handgun. https://www.rawpixel.com/image/14843912/png-vintage-gun-weaponry-firearm-handgun View license
25, Rue des Blancs Manteaux (Café, rue des Blancs Manteaux) by Eugène Atget https://www.rawpixel.com/image/14265376/25-rue-des-blancs-manteaux-cafe-rue-des-blancs-manteaux-eugene-atget Free Image from public domain license
U.S. Army Spc. Colton Davis, an infantryman assigned to Company C, 2nd Battalion, 198th Armor Regiment, 155th Armored… https://www.rawpixel.com/image/3319114/free-photo-image-155th-abct-armored-brigade-combat-team-198th-armor-regiment Free Image from public domain license
The Brave Captain Tyrrill in the Buckingham of 66 Guns and 472 Men, Defeating the Florissant, Aigrette & Atalante, Three… https://www.rawpixel.com/image/9205324/image-clouds-vintage-ocean Free Image from public domain license
Cannon png sticker, medieval weapon illustration on transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6552993/png-vintage-public-domain Free PNG from public domain license
Farmer wagon vehicle wheel transportation. AI generated Image by rawpixel. https://www.rawpixel.com/image/12638194/farmer-wagon-vehicle-wheel-transportation-generated-image-rawpixel View license
Military vehicle weapon tank. AI generated Image by rawpixel. https://www.rawpixel.com/image/11977695/png-white-background-cartoon View license
Honor to whom honor is due, Jas G. Johnson & Co., importers, jobbers and manufacturers of millinery, felt & fancy hats https://www.rawpixel.com/image/7688202/image-art-vintage-public-domain Free Image from public domain license
Cannon weapon png sticker illustration, transparent background. Free public domain CC0 image https://www.rawpixel.com/image/6605294/png-sticker-vintage Free PNG from public domain license
An Afghan National Army soldier assigned to Mobile Strike Force Kandak fires an RPG-7 rocket-propelled grenade launcher May… https://www.rawpixel.com/image/3319591/free-photo-image-cannon-afghanistan-ana Free Image from public domain license
Discharge of a huge French cannon caught by the camera just as the projectile left for the German lines. The gunners have… https://www.rawpixel.com/image/8799766/photo-image-vintage-airplane-public-domain Free Image from public domain license
Royal Canadian Navy Leading Seaman Chad Downey, a clearance diver assigned to Fleet Dive Unit (Atlantic), inspects a… https://www.rawpixel.com/image/3317832/free-photo-image-robot-american-army Free Image from public domain license
PNG Black french clarinet oboe white background saxophone. AI generated Image by rawpixel. https://www.rawpixel.com/image/12823733/png-white-background View license
PNG Opened vintage scroll brown white background cylinder. https://www.rawpixel.com/image/13601366/png-opened-vintage-scroll-brown-white-background-cylinder View license
PNG Vehicle wheel transportation architecture. https://www.rawpixel.com/image/14034493/png-vehicle-wheel-transportation-architecture View license
PNG Vehicle wheel transportation machine. https://www.rawpixel.com/image/13555246/png-vehicle-wheel-transportation-machine View license
PNG Military tank side military vehicle weapon. https://www.rawpixel.com/image/14034508/png-military-tank-side-military-vehicle-weapon View license
PNG wine bottle sticker white border, transparent background https://www.rawpixel.com/image/9572866/png-wine-bottle-sticker-white-border-transparent-background View license
PNG Cooking Mushroom Risotto painting illustrated weaponry. https://www.rawpixel.com/image/14783338/png-cooking-mushroom-risotto-painting-illustrated-weaponry View license
Cannon soldiers png sticker illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6664505/png-sticker-vintage Free PNG from public domain license
Cannon weapon png sticker illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6659696/png-sticker-public-domain Free PNG from public domain license
Telescope png, isolated object, transparent background https://www.rawpixel.com/image/9831068/png-collage-element-history View license
Midnight Sun 1940 Eric Ravilious 1903-1942 Presented by the War Artists Advisory Committee 1946Ravilious was attached to the… https://www.rawpixel.com/image/9975540/image-art-vintage-public-domain Free Image from public domain license
Vintage man png illustration, transparent background. Remixed by rawpixel. https://www.rawpixel.com/image/10381624/png-face-person View license