Lesley Chamberlain looks at people looking at paintings.
Last year Tate Modern had six million visitors.
It was the biggest tourist attraction in the country.
Why is gallery-going so popular? Art has shifted from being the material of high culture towards art as provocation.
It still speaks to experts but its real attention is on the responsive passer by.
Why should this be so and does it matter?
Producer: Tim Dee.
Lesley Chamberlain explores why people look at paintings in galleries.