The Iron Cross was a military decoration in the Kingdom of Prussia, and later in the German Empire (1871–1918) and Nazi Germany (1933–1945). The design, a black cross pattée with a white or silver outline, was derived from the insignia of the medieval Teutonic Order and borne by its knights from the 13th century. As well as being a military medal, it has also been used as an emblem by the Prussian Army, the Imperial German Army, and the Reichswehr of the Weimar Republic, while the Balkenkreuz variant was used by the Wehrmacht. The Iron Cross is now the emblem of the Bundeswehr, the modern German armed forces.

A cross pattée, cross patty or Pate, or cross paty, also known as a cross formy or cross formée, is a type of Christian cross with arms that are narrow at the centre, and often flared in a curve or straight line shape, to be broader at the perimeter. The form appears very early in medieval art, for example in a metalwork treasure binding given to Monza Cathedral by Lombard queen Theodelinda, and the 8th-century lower cover of the Lindau Gospels in the Morgan Library. An early English example from the start of the age of heraldry proper is found in the arms of Baron Berkeley.