I cannot remember the museum, alas. I remember that it was a huge painting dominating the end of a hallway, so I saw it and reacted to it long before I saw who painted it. Perhaps if I had stood and stared at it for ten minutes its glories would have been revealed, but two things prevented that: 1) as I suggested earlier, it gave me no reason to want to stare at it for even one minute; 2) I have never stared at any painting, no matter how great I found it or how moved I was by it, for more than 3 or 4 minutes in my entire life.