An engaging examination of one of the Royal Academy's most important treasures, the painting described by Lucian Freud as 'the greatest painting in the world'Each year between 1819 and 1825, John Constable (1776-1837) submitted a monumental canvas to the Royal Academy of Arts in London for display in the annual Exhibition. These so-called six-footers vividly captured the life of the River Stour in Suffolk, where Constable grew up and where he returned to paint each year. The Leaping Horse, th...