“Unconventionalpaintings.com” by Carl Dunn is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License – https://www.flickr.com/photos/132561248@N06/36646241065/
“Asian Art Museum of San Francisco, 50th Anniversary” by Thomas Hawk is licensed under a Creative Commons Attribution-NonCommercial 4.0 International license – https://www.flickr.com/photos/thomashawk/24967960245/
“2016-05-16 colors” by Mo is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License – https://www.flickr.com/photos/april-mo/26440476503/
“Duesseldorf Harbour” by Reto Fetz is licensed under a Creative Commons Attribution-NonCommercial 4.0 International license – https://www.flickr.com/photos/swisscan/2566350435/
“Untitled” by John Mignault is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License – https://www.flickr.com/photos/jmignault/25632926192/
