Archduke was the title born from 1358 by the Habsburg rulers of the Archduchy of Austria, and later by all senior members of that dynasty. It denotes a rank within the former Holy Roman Empire (962–1806), which was below that of Emperor, and roughly equal to King, Prince-Archbishop, and Grand prince, but above that of a Grand Duke, Sovereign Prince, and Duke.
Archducal hat, the coronet of an archduke
Bust of Archduke Leopold Wilhelm of Austria
The heir to the Austro-Hungarian throne, Archduke Franz Ferdinand (right) with his family. Ferdinand, along with his wife, was assassinated at Sarajevo in 1914, which sparked World War I
The House of Habsburg, also known as the House of Austria, is one of the most prominent and important dynasties in European history.
Profile portrait of Leopold I highlighting his "Habsburg jaw", Deutsches Historisches Museum
"PLUS OULTRE", motto of Charles V in French, on a ceiling of the Palace of Charles V in Granada