The Great Design of Henry IV: From the Memoirs of the Duke of Sully and the United States of Europe (1909) is a historical book written by Maximilien De Bethune, the Duke of Sully. The book explores the grand vision of King Henry IV of France, who aimed to establish a united Europe under a single government. The author draws extensively from his own memoirs as well as other historical sources to provide a detailed account of Henry IV's plan and the...