Anne of Cleves was Queen of England from 6 January to 12 July 1540 as the fourth wife of King Henry VIII. Not much is known about Anne before 1527, when she became betrothed to Francis, Duke of Bar, son and heir of Antoine, Duke of Lorraine, although their marriage did not proceed. In March 1539, negotiations for Anne's marriage to Henry began, as Henry believed that he needed to form a political alliance with her brother, William, who was a leader of the Protestants of Western Germany, to strengthen his position against potential attacks from Catholic France and the Holy Roman Empire.

John III, Duke of Cleves and Count of Mark, known as John the Peaceful, was the Lord of Ravensberg, Count of Mark, and founder of the United Duchies of Jülich-Cleves-Berg.