Theodore II Palaiologos or Palaeologus (Greek: Θεόδωρος Β΄ Παλαιολόγος, ''Theodōros II Palaiologos'') (c. 1396 – 21 June 1448) was
Despot in the
Morea from 1407 to 1443 and in
Selymbria from then until his death.
Life

Theodore II Palaiologos was a son of the
Byzantine Emperor
The foundation of Constantinople in 330 AD marks the conventional start of the Eastern Roman Empire, which Fall of Constantinople, fell to the Ottoman Empire in 1453 AD. Only the emperors who were recognized as legitimate rulers and exercised s ...
Manuel II Palaiologos and his wife
Helena Dragaš. His maternal grandfather was the
Serb prince
Constantine Dragaš. His brothers included emperors
John VIII Palaiologos and
Constantine XI Palaiologos, as well as
Demetrios Palaiologos and
Thomas Palaiologos, despots in the
Despotate of Morea, and
Andronikos Palaiologos, despot in
Thessalonica.
When Theodore was a little over ten years old, his father proclaimed him a despot (''despotēs'') and appointed him to govern Morea after the death of his uncle
Theodore I Palaiologos in 1407. The nobleman
Nicholas Eudaimonoioannes was appointed as his tutor and regent until he came of age. The first period of his rule was a time of war against the Latin states in
Greece
Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...
for the unification of
Morea. Theodore II's enemies in that period included the
Republic of Venice
The Republic of Venice, officially the Most Serene Republic of Venice and traditionally known as La Serenissima, was a sovereign state and Maritime republics, maritime republic with its capital in Venice. Founded, according to tradition, in 697 ...
, which sent troops to impede his attempt to conquer
Patras. During Theodore's minority, his father Emperor Manuel II stayed in Morea and supervised its administration and defense, rebuilding the ''
Hexamilion'' wall across the
Isthmus of Corinth
The Isthmus of Corinth ( Greek: Ισθμός της Κορίνθου) is the narrow land bridge which connects the Peloponnese peninsula with the rest of the mainland of Greece, near the city of Corinth. The wide Isthmus was known in the a ...
.

A moment of drastic change in policy was his marriage to the Latin noblewoman
Cleofa Malatesta, arranged with the help of her uncle
Pope Martin V
Pope Martin V (; ; January/February 1369 – 20 February 1431), born Oddone Colonna, was the head of the Catholic Church and ruler of the Papal States from 11 November 1417 to his death in February 1431. His election effectively ended the We ...
, who became Theodore's ally and supporter. In a letter from around the time of Manuel II's death (July 21, 1425), Pope Martin V called Theodore II emperor of
Constantinople
Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...
(''ad Theodorum imperatorem constantinopolitanum'') but the crown actually passed to his older brother John VIII.
The war in Morea had started to go against the Byzantines and, under pressure from
Carlo I Tocco, the Count of
Kefalonia
Kefalonia or Cephalonia (), formerly also known as Kefallinia or Kephallonia (), is the largest of the Ionian Islands in western Greece and the 6th-largest island in Greece after Crete, Euboea, Lesbos, Rhodes and Chios. It is also a separate regio ...
and ruler of
Epirus
Epirus () is a Region#Geographical regions, geographical and historical region, historical region in southeastern Europe, now shared between Greece and Albania. It lies between the Pindus Mountains and the Ionian Sea, stretching from the Bay ...
, the Despot demanded help from his brother John VIII. That help came in the form of reinforcements led by their brother Constantine, who became joint governor of Morea with Theodore II in 1428. The united efforts of the brothers contributed to the
naval victory at the
Echinades in 1427 and the conquest of Patras in 1430.
On the other hand, Emperor John VIII declared Theodore's younger brother Constantine
regent
In a monarchy, a regent () is a person appointed to govern a state because the actual monarch is a minor, absent, incapacitated or unable to discharge their powers and duties, or the throne is vacant and a new monarch has not yet been dete ...
of the empire during his voyage to
Florence
Florence ( ; ) is the capital city of the Italy, Italian region of Tuscany. It is also the most populated city in Tuscany, with 362,353 inhabitants, and 989,460 in Metropolitan City of Florence, its metropolitan province as of 2025.
Florence ...
in 1438, which emphasized his selection of Constantine as his intended heir. The next several years were marred by disputes with Constantine over the succession to the childless John VIII. In a compromise, Theodore II Palaiologos surrendered his claim to the throne in exchange for Constantine's domain (
appanage) of Selymbria (
Silivri
Silivri, formerly Selymbria (Greek language, Greek: Σηλυμβρία), is a municipality and Districts of Turkey, district of Istanbul Province, Istanbul Province, Turkey. Its population is 217,163 (2022). It lies along the Sea of Marmara, outsi ...
) in 1443, where he died of plague five years later, in 1448, predeceasing his brothers.
Family
By his marriage to
Cleofa Malatesta, an Italian aristocrat, Theodore II Palaiologos had at least one daughter:
#
Helena Palaiologina. She married King
John II of Cyprus.
Bibliography
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Joseph Freiherr von Hammer-Purgstall "Geschichte des Osmanischen Reiches"
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Edward Gibbon
Edward Gibbon (; 8 May 173716 January 1794) was an English essayist, historian, and politician. His most important work, ''The History of the Decline and Fall of the Roman Empire'', published in six volumes between 1776 and 1789, is known for ...
"
The History of the Decline and Fall of the Roman Empire
''The History of the Decline and Fall of the Roman Empire'', sometimes shortened to ''Decline and Fall of the Roman Empire'', is a six-volume work by the English historian Edward Gibbon. The six volumes cover, from 98 to 1590, the peak of the Ro ...
"
*
George Sphrantzes : The Fall of the Byzantine Empire
{{DEFAULTSORT:Theodore 02 Palaiologos
1390s births
1448 deaths
15th-century Byzantine people
15th-century Despots of the Morea
Palaiologos dynasty
15th-century deaths from plague (disease)
Despots of the Morea
15th-century monarchs in Europe
Sons of Byzantine emperors