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I clearly remember in my mind what happened at Nationally gallery when I was there in '90s. I was really in hurry to see Rembrandt's paintings but suddenly a shining yellow thing hit my perspective from a distance. It was a magical charge which made me to change direction and when was closer I realized it is Vincent's sunflowers. There were so beautiful, warm feelings to stand before it, that I suddenly realized why somebody could pay a fortune to get it. I have never had such a strong experience at all. All printed versions are worthless, you need to see it, go the galleries :-)