TATE MODERN has a really great website! While on my lunch break I was able to explore the rooms of the museum! You just click on a wing or a room and then a page of the artists' works comes up, where you can then click on any artist to see the image larger. I like this easy search because so many museums make their collections impossible to view. They also have a feature called "history" that you click on and can choose a time period on a timeline and a whole assortment of images from that year pop up.