Rare Michelangelo drawing expected to fetch up to £5m

A rare Michelangelo drawing is expected to sell for up to £5 million in London next month, according to Christie's.

The male nude is one of only 24 sheets relating to The Battle of Cascina, an uncompleted work described by the auction house as "one of the greatest Western masterpieces that never was".

The only time the drawing has been seen in public was in Vienna last year....