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Visual works (works),
A
Ad*Access | Duke University (Libraries), North Carolina, United States
Albumarium | Vilem Ries, Zürich, Switzerland
Art Gallery NSW Collection | Art Gallery of New South Wales, Sydney, Australia
Art Institute of Chicago Collections | Art Institute of Chicago, Illinois, United States
Asian Art Museum of San Francisco Collection | Asian Art Museum of San Francisco, California, United States
Australian Prints + Printmaking | National Gallery of Australia, Canberra, Australia
B
BHL Flickr | Biodiversity Heritage Library (BHL), Washington, D.C, United States
BILDGEIST | Eva Elisabeth Stockinger, Munderfing, Austria
British Library Flickr Commons | British Library, London, United Kingdom
British Museum Collection Online | British Museum, London, United Kingdom
The Broad Collection | The Broad, California, United States
C
Callisphere | University of California (Libraries), California, United States
Cleveland Museum of Art Collections | Cleveland Museum of Art, Ohio, United States
Creative Vix Free Stock Images | Creative Vix, Essex, United Kingdom
D
David Rumsey Map Collection | Cartography Associates, San Francisco, United States
DesignerPics.com | Jeshu John, Kerala, India
Display | Kind Company, New York, United States
Divvy Pixel Free Public Domain Images | Divvy Pixel
E
Epicantus Photo Archive | Daria Nepriakhina, Netherlands
Ernst Haeckel’s Kunstformen der Natur (1904) | Wikimedia Foundation, California, United States
Everystockphoto | Vibrant Software Corp., Vancouver, Canada
F
FAMSF Collections | Fine Arts Museums of San Francisco, San Francisco, United States
Folger Digital Image Collection | Folger Shakespeare Library, Washington, D.C, United States
FoodieFeed | Jakub Kapusnak, Prague, Czech Republic
Foter | Innovaweb Sp. z o.o., Rybnik, Poland
Free Nature Stock | Adrian Pelletier, New Hampshire, United States
Freepik | Freepik, Malaga, Spain
G
Getty Images Embed | Getty Images, Washington, United States
Google Material Icons | Google, California, United States
Gratisography | Ryan McGuire (Bells Design), New York, United States
Guggenheim Museum Collection Online | Solomon R. Guggenheim Museum, New York, United States; Guggenheim Museum Bilbao, Bilbao, Spain; Peggy Guggenheim Collection, Venice, Italy
H
Herman Miller Images | Herman Miller, Inc., Michigan, United States
Hermitage Museum Collection Online | Hermitage Museum, Saint Petersburg, Russia
I
IM Free Collections | IM Creator Ltd., New York, United States
ISO Republic | Tom Eversley, Kent, United Kingdom
Israel Museum Collections | Israel Museum, Jerusalem, Israel
J
J. Paul Getty Museum Open Content | J. Paul Getty Museum, Los Angeles, United States
Jay Mantri Photo Archive | Jay Mantri, California, United States
L
LACMA Collections | Los Angeles County Museum of Art (LACMA), California, United States
Life of Pix | Leeroy Advertising Agency, Montreal, Canada
LIFE Photo Archive | Time Inc., New York, United States
Lock & Stock Photos | AJ Montpetit, Minnesota, United States
Louvre Museum Collections | Louvre Museum, Paris, France
M
Mauritshuis Collection | Mauritshuis, The Hague, Netherlands
MET Museum Open Access for Scholarly Content (OASC) | Metropolitan Museum of Art, New York, United States
MFA Boston Collections | Museum of Fine Arts, Boston, United States
The MFAH Collections | Museum of Fine Arts, Houston, United States
Minneapolis Institute of Arts Collection | Minneapolis Institute of Arts, Minnesota, United States
MMT Photos | Jeffrey Betts, Brooklyn, United States
MNML Wallpapers | AJ Montpetit, Minnesota, United States
MMFA Collections | Montreal Museum of Fine Arts, Quebec, Canada
Multicolr Search Lab | TinEye, Ontario, Canada
Museu D’art de Catalunya Collection | Museu d’Art de Catalunya, Barcelona, Spain
The Museum at Fashion Institute of Technology (MFIT) Collections | State University of New York, New York, United States
Museum of Modern Art (MOMA) Collection | Museum of Modern Art, New York, United States
N
NASA Image Galleries | National Aeronautics and Space Administration (NASA), Washington, D.C, United States
NASA ASTER’s Satellite Image Gallery | Jet Propulsion Laboratory (NASA), California, United States
NASA’s Earth Observatory Images | National Aeronautics and Space Administration (NASA), Washington, D.C, United States
The National Gallery (London) Paintings | National Gallery, London, United Kingdom
NGA Images | National Gallery of Art, Washington, DC, United States
National Gallery of Australia Collection | National Gallery of Australia, Canberra, Australia
National Gallery of Victoria Collection | National Gallery of Victoria (NGV), Melbourne, Australia
National Geographic Wallpapers | National Geographic Society, Washington, D.C, United States
National Media Museum Flickr Commons | National Media Museum, Bradford, United Kingdom
The Noun Project | The Noun Project, Inc., Los Angeles, United States
NYPL Digital Collections | New York Public Library, New York, United States
O
OMCA Political Posters | Oakland Museum, California, United States
Open F|S | Arthur M. Sackler Gallery and Freer Gallery of Art, Washington, D.C, United States
P
Paul K (Peacay) BibOdyssey Flickr | Paul K (Peacay), Sydney, Australia
The Pattern Library | Tim Holman, New York, United States; Claudio Guglieri, California, United states
Pexels | Lengemann Tizian, Joseph Bruno and Joseph Ingo, Hesse, Germany
Philadelphia Museum of Art Collections | Philadelphia Museum of Art, Pennsylvania, United States
Photogen | Photogen.com, United Kingdom
Picjumbo | Viktor Hanacek, Czech Republic
Pixabay | Hans Braxmeier and Simon Steinberger, Ulm, Germany
Princeton University Art Museum Collections | Princeton University, Art Museum, Princeton, United States
Prints & Photographs Online Catalog (PPOC) | Library of Congress, Washington, DC, United States
Project Apollo Archive (Flickr) | Kipp Teague, Virginia, United States
The Public Domain Review Collections | The Open Knowledge Foundation, Cambridge, United Kingdom
Q
qthomasbower Visual Mashups | qthomasbower, Arizona, United States
R
Raumrot.com | Markus Spiske, Bavaria, Germany
Rijksmuseum Collections | Rijksmuseum, Amsterdam, Netherlands
S
Skitterphoto | Skitterphoto, Groningen, Netherlands
SpaceX Photos Flickr | Space Exploration Technologies Corporation (SpaceX), California, United States
Splashbase.co (Images) | Splashbase.co, California, United States
Split Shire | Daniel Nanescu, Turin, Italy
Stocksnap.IO | Marc Chouinard and Christopher Gimmer, Ontario, Canada
Subtle Patterns | Atle Mo, Oslo, Norway
Superfamous Images | Superfamous Studios, California, United States
T
Tate Collections | Tate, London, United Kingdom
Te Papa Collections Online | Museum of New Zealand Te Papa Tongarewa, Wellington, New Zealand
Texturegen | Texturegen.com, United Kingdom
Tokyo National Museum (TNM) Collections | Tokyo National Museum, Tokyo, Japan
Tookapic Stock Photos | High on Pixels, Białystok, Poland
Travel Coffee Book | Singapore Geek Girls, Singapore
Tret’yakov Gallery Collections | Tret’yakov Gallery, Moscow, Russia
U
Unsplash | Crew, Montreal, Canada
The U.S. National Archives Flickr | National Archives and Records Administration (NARA), Missouri, United States
V
VADS Collections | University for the Creative Arts, Farnham, United Kingdom
Van Gogh Museum Collections | Van Gogh Museum, Amsterdam, Netherlands
Victoria And Albert (V&A) Museum Collections | Victoria and Albert Museum, London, United States
Viintage Graphics | Viintage.com, Georgia, United States
Vintage Printable | Swivelchair Media, California, United States
Virtual Collection of Asian Masterpieces (VCM) | Asia-Europe Museum Network (ASEMUS), Singapore
W
Walker Collections | Walker Art Center, Minnesota, United States
Wallace Live | The Wallace Collection, London, United Kingdom
Walters Art Museum Online Collection | Walters Art Museum, Maryland, United States
Wellcome Images | Wellcome Library, London, United Kingdom
Whitney Museum of American Art Collection | Whitney Museum of American Art, New York, United States
Wikimedia Commons | Wikimedia Foundation, California, United States