The title of 'Archduke' (feminine: 'Archduchess') (
German: ''Erzherzog'', feminine form: ''Erzherzogin'') denotes a rank above
Duke and under
King, but is too rare and yet has uses too diverse to be given a fixed relative position within the former
Holy Roman Empire to which it was restricted. It has only ever been continuously borne by princes of the House of
Habsburg and later through the female line into the House of
Habsburg-Lorraine.
Ruler style
The English word is recorded only since 1530, derived from Middle - via Old French ''archeduc'', from
Merovingian Latin ''archidux'', from ''arch(i)-'' (see arch- (adj.)) +
dux 'duke' .
Archduke (''Erzherzog'') is a title distinct from
Grand Duke (''Großherzog'' or ''Großfürst'') used in some other
German royal houses and still in sovereign
Luxemburg.
First use was as a the title of the rulers of
Austrasia (c.750), one of the Frankish realms resulting from the complex successions in the house of
Clovis, roughly comprising Germany,
Switzerland and the
Low Countries.
In the
Carolingian empire it was awarded as a unique promotion to the duke of
Lotharingia (larger then Lorraine), which could been seen as successor to the former Carolingian kingdom of Lothringia which had been at par at least with West Francia (modern France) in the dynastic divisions under the early heirs of
Charlemagne but ended up absorbed by East Francia (Greater Germany).
After the split (959) of the (arch)duchy into Upper- (German ''Oberlothringen'', including modern
Lorraine) and Lower Lothringia (German ''Niederlothringen'', north of it, with seat at
Cologne and originally vested in its
Archbishop, but up stretching all the way to
Frisia) and the latter's further fragmentation, two of the 'succeeding' duchies in the Low Countries,
Brabant (mainly in present Belgium) and
Gelre (now in the Dutch kingdom, gave its name to the province of
Gelderland), claimed the archducal rank but never were officially granted it by the
Holy Roman Emperor. The
Dutch form is ''Aartshertog''.

Crown of the Archduke of Austria.
The title Archduke of Austria, the only one to become generally notable, was invented in the
Privilegium Maius, a
14th century forgery initiated by Duke
Rudolf IV of Austria. Originally, it was meant to denote the ruler of the (thus 'Arch')duchy of
Austria, in an effort to put that ruler on par with the
electorships, as Austria had been passed over in the
Golden Bull of 1356, where the electorships had been assigned. Holy Roman Emperor
Charles IV refused to recognize the title.
Duke
Ernest the Iron and his descendants unilaterally assumed the title "archduke";
This title was only officially recognized in
1453 by
Emperor Frederick III, when the
Habsburgs had (permanently) gained control of the office of the
Holy Roman Emperor.
First it was granted to Frederick's younger brother, Albert VI of Austria, d. 1463, who used the title at least from 1458.
In 1477, Frederick III granted the title archduke also to his first cousin,
Sigismund of Austria, ruler of
Further Austria.
Also Frederick's son and heir, the future
Emperor Maximilian I started to use the title, but obviously only after the death of his wife
Mary of Burgundy, d. 1482, as the title never appears in documents of joint Maximilian and Mary rule in the Low Countries (where Maximilian is still titled Duke of Austria). The title appears first in documents of joint Maximilian and
Philip (his under-age son) rule in the Low Countries.
Emperor Frederick III himself used just Duke of Austria, never Archduke, until his death in 1490.
Ladislaus the Posthumous, Duke of Austria, who died in 1457, was never in his lifetime authorized to use it, and accordingly, not he nor anyone in his branch of the dynasty, ever used the title.
Female children of the dynasty were not entitled to the title yet in the 15th century. It was used only by those dynasts who reigned a Habsburg territory, i.e only by males and their consorts.
Other dynastic Habsburg use
Like
Grand prince (often rendered as
Grand Duke, actually a lower rank; the German equivalent is ''Großfürst'', not ''Großherzog''; the main cases were
Lithuania, which in 1386 formed a
personal union with Poland, and
Moscovia, the nucleus of the later imperial Russia till its ruler assumed the sovereign style
Tsar of royal rank, still later Emperor) in imperial Russia, archduke was used for non-(sovereign) rulers as a titular rank for princes of the Austrian ruling house of Habsburg, in chief of an Austrian homeland but without becoming its hereditary ruler (occasionally it might be combined with a separate gubernatorial mandate), as all territories remained vested in the Austrian crown.
From the
16th century onward, Archduke or its female form, Archduchess, came to be used by all the members of the
House of Habsburg, similar to the title
Prince in many other royal houses. For example, Queen
Marie Antoinette of France was born Maria Antonia, Archduchess of Austria. This practice was maintained in the
Austrian Empire (
1804-
1867) and the
Austro-Hungarian Empire (1867-
1918).
With the abolition of the monarchy, noble titles and the peerage system were also abolished in Austria. Thus, those members of the extended Habsburg family who are citizens of the Republic of Austria, are simply known by their respective first name and their surname Habsburg-Lothringen. The use of aristocratic titles such as archduke is in fact illegal in Austria. However, some members of the family who are citizens of other countries such as
Germany, where aristocratic titles have become part of the name, may use the title.
Fictional Archdukes
★
Poggle the Lesser was the Archduke of
Geonosis, a planet from the
Star Wars universe.
Sources and references
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EtymologyOnLine
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Use of the title "archduke" in contemporaneous documents
See also
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Archducal hat
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List of rulers of Austria