Towards the end of his life Titian didn't finish his paintings. The 87 year-old artist kept them in his studio, never quite completing them, as though wanting to endlessly postpone the moment of closure. Created with the fingers as much as the brush, Titian's last paintings are imbued with a sense of final, desperate effort - a rawness and immediacy that weren't to be seen again in art for centuries. But what did Titian, who experienced as much in the way of material success as any artist before or since, mean by these works? Are they a harrowing, final testament or simply a collection of...