Tate Modern in London is the world's most visited modern art gallery. It's just over 10 years old now, although the original Tate Gallery, now called Tate Britain, goes back more than 100 years to 1897. In the ten years of Tate Modern though, it's become the most visited modern art gallery in the world, with some attendant problems. The recent blockbuster Gauguin exhibition drew record crowds but also created a new phenomenon in contemporary art museums: gallery rage. The queues were so long and the crowds so big that visitors complained they didn't really get a chance to see the works.