For the BBC 18th Century Season, Sean Rafferty looks at 12 Georgian art works from the Royal Collection at the Queen's Gallery, guided by Desmond Shawe-Taylor, Surveyor of The Queen's Pictures. No.11 of 12: Don Rodrigo Caldero on Horseback, by Rubens, 1612-15. You can see all 12 art works in the 18th Century Gallery on the Radio 3 website.