Balthazar Gerbier, an artist and architect, connoisseur and curator, secret agent and diplomat, a friend of Rubens and counsellor to kings, his life offers a window into dazzling 17th century England and Europe. Gerbier assembled the famous art collection for the Duke of Buckingham at London's York House. Lita-Rose Betcherman has written the definitive and long-awaited biography of Gerbier.