Impressionism by Vincent Van Gogh. This painting is ranked one of the most famous paintings. Even though the image is quite simple (of sunflowers) I think it's really effective. The colors work really well together and its clear to see what the image is of. Even though the painting is mostly 2D it gives a 3D feel to the vase.
“Irises, Saint-Remy, 1889,” by post-Impressionist Grand Master Vincent Van Gogh (1853 – 1890), depicts the garden of the hospital where he was a recuperating, and was painted a few months before he died.