Constantine X Doukas
or Ducas ( el, Κωνσταντῖνος Δούκας, ''Kōnstantinos X Doukas'', 1006 – 23 May 1067), was
Byzantine emperor
This is a list of the Byzantine emperors from the foundation of Constantinople in 330 AD, which marks the conventional start of the Eastern Roman Empire, to its fall to the Ottoman Empire in 1453 AD. Only the emperors who were recognized as l ...
from 1059 to 1067. He was the founder and first ruling member of the
Doukid dynasty
The House of Doukas, Latinized as Ducas ( el, Δούκας; feminine: Doukaina/Ducaena, Δούκαινα; plural: Doukai/Ducae, Δοῦκαι), from the Latin title ''dux'' ("leader", "general", Hellenized as 'ðouks'', is the name of a Byzant ...
. During his reign, the
Normans
The Normans ( Norman: ''Normaunds''; french: Normands; la, Nortmanni/Normanni) were a population arising in the medieval Duchy of Normandy from the intermingling between Norse Viking settlers and indigenous West Franks and Gallo-Romans. T ...
took over much of the remaining Byzantine territories in Italy while in the
Balkans
The Balkans ( ), also known as the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throughout the who ...
the Hungarians occupied
Belgrade. He also suffered defeats by the
Seljuk sultan
Alp Arslan
Alp Arslan was the second Sultan of the Seljuk Empire and great-grandson of Seljuk, the eponymous founder of the dynasty. He greatly expanded the Seljuk territory and consolidated his power, defeating rivals to the south and northwest, and his ...
.
Reign

Constantine's parents are not mentioned in any primary sources, but some scholars theorize that he was the son of Andronikos Doukas, a nobleman who served as ''
strategos
''Strategos'', plural ''strategoi'', Latinized ''strategus'', ( el, στρατηγός, pl. στρατηγοί; Doric Greek: στραταγός, ''stratagos''; meaning "army leader") is used in Greek to mean military general. In the Hellenisti ...
'' of
Preslav
The modern Veliki Preslav or Great Preslav ( bg, Велики Преслав, ), former Preslav ( bg, link=no, Преслав; until 1993), is a city and the seat of government of the Veliki Preslav Municipality (Great Preslav Municipality, new ...
during the reign of
Basil II
Basil II Porphyrogenitus ( gr, Βασίλειος Πορφυρογέννητος ;) and, most often, the Purple-born ( gr, ὁ πορφυρογέννητος, translit=ho porphyrogennetos).. 958 – 15 December 1025), nicknamed the Bulgar ...
().
Historians often give his bithdate as 1006, as he is said to have died aged "slightly over sixty years". He was an academic, addicted to endless debates about philosophy and theology, and he gained influence after he married, as his second wife,
Eudokia Makrembolitissa
Eudokia Makrembolitissa ( el, Εὐδοκία Μακρεμβολίτισσα, Eudocia Macrembolitissa) was a Byzantine empress by her successive marriages to Constantine X Doukas and Romanos IV Diogenes. She acted as regent of her minor son, Mic ...
, a niece of Patriarch
Michael Keroularios
Michael I Cerularius or Keroularios ( el, Μιχαήλ Α΄ Κηρουλάριος; 1000 – 21 January 1059 AD) was the Patriarch of Constantinople from 1043 to 1059 AD. His disputes with Pope Leo IX over church practices in the 11th century p ...
.
[Kazhdan 1991, p. 504] In 1057, Constantine supported the usurpation of
Isaac I Komnenos
Isaac I Komnenos or Comnenus ( grc-gre, Ἰσαάκιος Κομνηνός, ''Isaakios Komnēnos''; – 1 June 1060) was Byzantine emperor from 1057 to 1059, the first reigning member of the Komnenian dynasty.
The son of the gen ...
, gradually siding with the court bureaucracy against the new emperor's reforms.
In spite of this tacit opposition, Constantine was chosen as successor by the ailing Isaac in 1059, under the influence of
Michael Psellos
Michael Psellos or Psellus ( grc-gre, Μιχαὴλ Ψελλός, Michaḗl Psellós, ) was a Byzantine Greek monk, savant, writer, philosopher, imperial courtier, historian and music theorist. He was born in 1017 or 1018, and is believed to hav ...
. Isaac abdicated on 22 November and Constantine X was
crowned emperor on the following day.
The new emperor quickly associated two of his young sons in power,
Michael VII Doukas
Michael VII Doukas or Ducas ( gr, Μιχαήλ Δούκας), nicknamed Parapinakes ( gr, Παραπινάκης, lit. "minus a quarter", with reference to the devaluation of the Byzantine currency under his rule), was the senior Byzantine e ...
and
Konstantios Doukas
Konstantios Doukas ( el, Κωνστάντιος Δούκας, 1060s – 18 October 1081), Latinized as Constantius Ducas, was a junior Byzantine emperor from 1060 to 1078. Konstantios was the son of Emperor Constantine X Doukas and Empress Eu ...
, appointed his brother
John Doukas as ''kaisar'' (
caesar
Gaius Julius Caesar (; ; 12 July 100 BC – 15 March 44 BC), was a Roman general and statesman. A member of the First Triumvirate, Caesar led the Roman armies in the Gallic Wars before defeating his political rival Pompey in a civil war, an ...
), and embarked on a policy favorable to the interests of the court bureaucracy and the church.
Severely undercutting the training and financial support for the armed forces, Constantine X disbanded the Armenian local militia of 50,000 men at a crucial point of time, coinciding with the westward advance of the
Seljuk Turks
The Seljuk dynasty, or Seljukids ( ; fa, سلجوقیان ''Saljuqian'', alternatively spelled as Seljuqs or Saljuqs), also known as Seljuk Turks, Seljuk Turkomans "The defeat in August 1071 of the Byzantine emperor Romanos Diogenes
by the Turk ...
and their Turcoman allies. Undoing many of the necessary reforms of
Isaac I Komnenos
Isaac I Komnenos or Comnenus ( grc-gre, Ἰσαάκιος Κομνηνός, ''Isaakios Komnēnos''; – 1 June 1060) was Byzantine emperor from 1057 to 1059, the first reigning member of the Komnenian dynasty.
The son of the gen ...
, he bloated the military bureaucracy with highly paid court officials and crowded the Senate with his supporters.
His decisions to replace standing soldiers with mercenaries and leaving the frontier fortifications unrepaired led Constantine to become naturally unpopular with the supporters of Isaac within the military aristocracy, who attempted to assassinate him in 1061.
He also became unpopular with the general population after he raised taxes to try to pay the army.
At the very start of his reign, the
Normans
The Normans ( Norman: ''Normaunds''; french: Normands; la, Nortmanni/Normanni) were a population arising in the medieval Duchy of Normandy from the intermingling between Norse Viking settlers and indigenous West Franks and Gallo-Romans. T ...
under
Robert Guiscard
Robert Guiscard (; Modern ; – 17 July 1085) was a Norman adventurer remembered for the conquest of southern Italy and Sicily. Robert was born into the Hauteville family in Normandy, went on to become count and then duke of Apulia and Calab ...
completed the conquest of Byzantine
Calabria, but Constantine showed a resurgent interest in retaining
Apulia. He appointed at least two
catepans of Italy
The Catepanate (or Catapanate) of Italy ( el, ''Katepaníkion Italías'') was a province of the Byzantine Empire from 965 until 1071. At its greatest extent, it comprised mainland Italy south of a line drawn from Monte Gargano to the Gulf of Sa ...
(
Marules and
Sirianus Sirianus was the Byzantine catapan of Italy, the second appointed by the Emperor Constantine X Doukas. He arrived in Bari, the seat of the catapanate, in 1061 or 1062, replacing Marules, who had been appointed the previous year. Constantine was th ...
) and sent reinforcements on two further occasions (under "
Miriarcha" and
Michael Maurex Maurex or Maurikas ( el, Μαύρηξ/Μαυρίκας) was a Byzantine naval commander active in the latter half of the 11th century, chiefly in the Byzantine–Norman Wars. His identity is not certain, as several different people are habitually id ...
). He also suffered invasions by
Alp Arslan
Alp Arslan was the second Sultan of the Seljuk Empire and great-grandson of Seljuk, the eponymous founder of the dynasty. He greatly expanded the Seljuk territory and consolidated his power, defeating rivals to the south and northwest, and his ...
in
Asia Minor
Anatolia, tr, Anadolu Yarımadası), and the Anatolian plateau, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the major part of modern-day Turkey. The ...
in 1064, resulting in the loss of the Armenian capital, and by the
Oghuz Turks
The Oghuz or Ghuzz Turks (Middle Turkic: ٱغُز, ''Oγuz'', ota, اوغوز, Oġuz) were a western Turkic people that spoke the Oghuz branch of the Turkic language family. In the 8th century, they formed a tribal confederation conven ...
in the
Balkans
The Balkans ( ), also known as the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throughout the who ...
in 1065, while
Belgrade was lost to the Hungarians.
Already old and unhealthy when he came to power, Constantine died on 23 May 1067. His final act was to demand that only his sons succeed him, forcing his wife Eudokia Makrembolitissa to take a vow not to remarry.
Family

By his first wife, a daughter of
Constantine Dalassenos, Constantine X Doukas had several daughters:
*Anna Doukaina, a nun.
*
Theodora Doukaina, who married
Domenico Selvo
Domenico Selvo (died 1087) was the 31st Doge of Venice, serving from 1071 to 1084. During his reign as Doge, his domestic policies, the alliances that he forged, and the battles that the Venetian military won and lost laid the foundations for m ...
,
Doge of Venice
The Doge of Venice ( ; vec, Doxe de Venexia ; it, Doge di Venezia ; all derived from Latin ', "military leader"), sometimes translated as Duke (compare the Italian '), was the chief magistrate and leader of the Republic of Venice between 726 ...
.
By his second wife,
Eudokia Makrembolitissa
Eudokia Makrembolitissa ( el, Εὐδοκία Μακρεμβολίτισσα, Eudocia Macrembolitissa) was a Byzantine empress by her successive marriages to Constantine X Doukas and Romanos IV Diogenes. She acted as regent of her minor son, Mic ...
, he had the following issue:
*
Michael VII Doukas
Michael VII Doukas or Ducas ( gr, Μιχαήλ Δούκας), nicknamed Parapinakes ( gr, Παραπινάκης, lit. "minus a quarter", with reference to the devaluation of the Byzantine currency under his rule), was the senior Byzantine e ...
, who succeeded as emperor.
*
Andronikos Doukas, co-emperor from 1068 to 1078.
*
Konstantios Doukas
Konstantios Doukas ( el, Κωνστάντιος Δούκας, 1060s – 18 October 1081), Latinized as Constantius Ducas, was a junior Byzantine emperor from 1060 to 1078. Konstantios was the son of Emperor Constantine X Doukas and Empress Eu ...
, co-emperor from 1060 to 1078, died in battle with the Normans in 1081
*Zoe Doukaina, who married
Adrianos Komnenos
Adrianos Komnenos ( el, )The first name is often Anglicized as Adrian, and the family name is frequently Latinized as Comnenus. was a Byzantine aristocrat and general, and a younger brother of the Byzantine emperor Alexios I Komnenos ().
Bio ...
, a brother of Emperor
Alexios I Komnenos
Alexios I Komnenos ( grc-gre, Ἀλέξιος Κομνηνός, 1057 – 15 August 1118; Latinized Alexius I Comnenus) was Byzantine emperor from 1081 to 1118. Although he was not the first emperor of the Komnenian dynasty, it was during ...
.
See also
*
List of Byzantine emperors
This is a list of the Byzantine emperors from the foundation of Constantinople in 330 AD, which marks the conventional start of the Byzantine Empire, Eastern Roman Empire, to Fall of Constantinople, its fall to the Ottoman Empire in 1453 AD. On ...
Notes
References
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External links
Coins of Constantine X Doukas
{{DEFAULTSORT:Constantine 10 Doukas
11th-century Byzantine emperors
Doukid dynasty
1006 births
1067 deaths
1050s in the Byzantine Empire
1060s in the Byzantine Empire