- The image "Claude Lorrain" is in the public domain. The original can be found here: http://commons.wikimedia.org/wiki/Fil...

- The image "Landscape with the Flight into Egypt" by Claude Lorrain is in the public domain. The original can be found here: http://commons.wikimedia.org/wiki/Fil...

- The image "Pastoral Landscape" by Claude Lorrain is in the public domain. The original can be found here: http://commons.wikimedia.org/wiki/Fil...

- The image "View of Haarlem" by Jacob Isaakszoon van Ruisdael is in the public domain. The original can be found here: http://en.wikipedia.org/wiki/File:Jac...

- The image "Sunset at Delicate Arch" is attributed to Wikimedia user Palacemusic and is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. The original can be found here: http://commons.wikimedia.org/wiki/Fil...

- The image "Et in Arcadia ego" by Nicholas Poussin is in the public domain. The original can be found here: http://en.wikipedia.org/wiki/File:Nic...

- The image "My Tho, Vietnam. A Viet Cong Base Camp Being Burned Down" is in the public domain. The original can be found here: http://commons.wikimedia.org/wiki/Fil...