It's Velasquez time at the National Gallery.
As a child I'd spend hours reading a Reprint Society volume of my mother's called "Paintings of the World's Great Galleries" - you can still find it on ebay. We had to make our own amusement then.
Even before I'd reached the age of discretion (and appreciation of the female posterior) I thought the Rokeby Venus was wonderful.
(For some reason I was also taken with Yves Tanguy. 'Multiplication des Arcs' looked like an organic, futuristic cityscape. And 'From Green to White' is reminiscent of HP Lovecraft's nightmare Antarctic city in 'At The Mountains of Madness'.)