The earliest heart-shaped charges in heraldry appear in the 12th century; the hearts in the coat of arms of Denmark go back to the royal banner of the kings of Denmark, in turn based on a seal used as early as the 1190s. However, while the charges are clearly heart-shaped, they did not in origin depict hearts, or symbolize any idea related to love. Instead they are assumed to have depicted the leaves of the water-lily. Early heraldic heart-shaped charges depicting the leaves of water-lilies are found in various other designs related to territories close to rivers or a coastline ("e.g." Flags of Frisia).