The 4 trees is one of Claude Monet‘s famous paintings. I need to do a project on it but I also found some useful comments on copyright on the wikipedia page hosting the image.

I have a printed copy hanging on my wall. It seems much pinker than one above and when I was looking for a digital version the colours all seem different. I am curious if this is because he did a bunch or because digitising colour is very technology dependant. I was also unaware that Impressionism was named after this picture called Impression Sunrise. This too appears in many images on the internet, each with slightly differing colours.

This is now displayed at the Musée Marmottan Monet in Paris, while Four Tress is in the Met in NYC.
A personal fascination became apparent when I discovered under US Law and the Berne treaties, a faithful photograph of two dimensional pictures do not create a new copyright and thus all the photos of Monet’s art are Public Domain since he died in 1926 and the copyright expired in 2006. …
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