The Grenville Diptych was a coat of arms produced between 1822 and 1839 for Richard Plantagenet Temple-Nugent-Brydges-Chandos-Grenville, 2nd Duke of Buckingham and Chandos, the son of the first Duke of Buckingham and Chandos. The diptych shows 719 quarterings of the family which include, among others, ten variations of the English Royal arms, the arms of Spencer, De Clare, Valence, Mowbray, Mortimer and De Grey.Image credit: Unknown