 The region has been divided between Germany and Denmark since 1920 and the symbol consequently appears in official heraldry in both countries.It is derived from the national coat of arms of Denmark and has been dated to the middle of the 13th century, first known from the arms of Erik Abelsøn, Duke of Schleswig.Throughout the ages, the design has featured both crowned and uncrowned lions, the lions have occasionally been accompanied by heraldic hearts, and usage between heraldic lions and leopards has shifted.