PERHAPS the finest engraver, painter and art theorist of the early Northern Renaissance was the Nuremberger, Albrecht Dürer. The range and diversity of his work is astonishing. His woodcuts made him famous across Europe, his engravings unparalleled. As a painter, he was equally successful – commissions for religious icons and portraits for the rich, powerful and cultured were abundant and diverse. He was naturally curious and well-traveled, too.