Here are some of my favorite pieces from the Tate Modern:
Whaam! by Roy Liechtenstein
Roaring Fourties, by Tacita Dean
Painting, by Joan Miro
Portrait of a Young Woman, by Meredith Frampton
Red on Maroon, by Mark Rothko
Composition B with Red, by Piet Mondrian
A Memory, by Laszlo Moholy-Nagy
Judi Dench, who, though not a piece of Tate Modern art, was brilliant in this evening's production of Hayfever.