Early life and appointment as despot , his mother
Helena Dragaš and his three oldest brothers
John (later Emperor John VIII),
Theodore and
Andronikos As the
Byzantine Empire fell apart and fragmented over the course of the 14th century, the emperors of the
Palaiologan dynasty came to feel that the only sure way to keep their remaining holdings intact was to grant them to their sons, receiving the title of
despot, as appanages to defend and govern. Emperor
Manuel II Palaiologos (1391–1425) had a total of six sons who survived infancy. Manuel's eldest surviving son,
John, was raised to co-emperor and designated to succeed Manuel as sole emperor upon his death. The second eldest son,
Theodore was designated as
Despot of the Morea and the third eldest,
Andronikos, was made Despot of
Thessaloniki in 1408 at just eight years old. Manuel's younger sons,
Constantine,
Demetrios, and Thomas (the youngest, born in 1409), were kept in
Constantinople as there was not sufficient land left to grant them. The younger children; Theodore, Andronikos, Constantine, Demetrios and Thomas were frequently described as having the distinction of
Porphyrogennetos ("born in the purple"; born in the imperial palace during the reign of their father), a distinction that does not appear to have been shared by the emperor-to-be John. Relations between the Palaiologos brothers were not always good. Though the young John and Constantine appears to have got on well with each other, relations between Constantine and the younger Demetrios and Thomas were not as friendly. The complex relationships between the sons of Manuel II were put to the test when John, now Emperor John VIII, appointed Constantine as Despot of the Morea in 1428. Since his brother Theodore refused to step down from his role as despot, the despotate became governed by two members of the imperial family for the first time since its creation in 1349. Soon thereafter, the younger Thomas (aged 19) was also appointed as Despot of the Morea, meaning that the nominally undivided despotate had effectively disintegrated into three smaller principalities. Theodore did not make way for Constantine or Thomas in the despotate's capital,
Mystras. Instead, Theodore granted Constantine lands throughout the Morea, including the northern harbor town of
Aigio, fortresses and towns in
Laconia (in the south), and
Kalamata and
Messenia in the west. Constantine made his capital as despot the town
Glarentza. Meanwhile, Thomas was given lands in the north and based himself in the castle of
Kalavryta.
Despot under the Byzantine Empire Strengthening the Morea in 1400. By the time Thomas became
Despot of the Morea in 1428, his older brother
Theodore had already worked to expand the despotate's (the southern territory on the map) borders somewhat. It would be expanded to cover almost the entire
Peloponnese by Thomas and his brother
Constantine.|alt= Shortly after being appointed as despots, Constantine and Thomas, together with Theodore, decided to join forces in an attempt to seize the flourishing and strategic port of
Patras in the north-west of the Morea, then under the rule of its Catholic Archbishop. The campaign, which was unsuccessful, possibly due to Theodore's reluctance to partake, was Thomas's first experience of war. Constantine later captured Patras on his own, ending 225 years of foreign ownership. Thomas's early tenure as Despot of the Morea was not without acquisitions either. For years, Thomas and Constantine had been eating away at the last remnants of the
Principality of Achaea, a crusader state established during the
Fourth Crusade in 1204 which had once governed almost the entire peninsula. It was Thomas who finally brought an end to the principality by marrying
Catherine Zaccaria, daughter and heir of the final prince,
Centurione II Zaccaria. With Centurione's death in 1432, Thomas could claim control over all of his remaining territories. By the 1430s, Thomas and Constantine had ensured that nearly the entire Peloponnese was once more in Byzantine hands for the first time since 1204, the only exception being the few port towns and cities held by the
Republic of Venice.
Murad II, Sultan of the
Ottoman Empire, which occupied most of the Byzantine Empire's former territory and had relegated the empire and the despotate as effectively vassal states, felt uneasy about the recent string of Byzantine successes in the Morea. In 1431,
Turahan Bey, a Turkish general who governed
Thessaly, sent his troops south to demolish the Morea's primary defensive fortifications, the
Hexamilion wall, in an effort to remind the despots that they were the Sultan's vassals. In March 1432, Constantine, possibly desiring to be closer to Mystras, made a new territorial agreement, presumably approved by Theodore and John VIII, with Thomas. Thomas agreed to cede his fortress Kalavryta to Constantine, who made it his new capital, in exchange for
Elis, which Thomas made his new capital. Though relations between the three despots thus appears to have been good in 1432, they soon soured. John VIII had no sons to succeed him and it was thus assumed that his successor would be one of his four surviving brothers (Andronikos having died some time before). John VIII's preferred successor was Constantine and though this choice was accepted by Thomas, who had developed good relations with his older brother, it was resented by the still older Theodore. When Constantine was summoned to the capital in 1435, Theodore believed this was to appoint Constantine as co-emperor and designated heir, which was not actually the case, and he too travelled to Constantinople to raise his objections. The quarrel between Constantine and Theodore was not resolved until the end of 1436, when the future Patriarch
Gregory Mammas was sent to reconcile them and prevent civil war. When Constantine was summoned to act as regent in Constantinople while John VIII was away at the
Council of Florence from 1437 to 1440, Theodore and Thomas stayed in the Morea. In November 1443, Constantine gave over control of
Selymbria, which he had received after helping to deal with the rebellion of their younger brother Demetrios, to Theodore, who in turn abandoned his position as Despot of the Morea, making Constantine and Thomas the sole Despots of the Morea. Though this brought Theodore closer to Constantinople, it also made Constantine the ruler of the capital of the Morea and one of the most powerful men in the small empire. With Theodore and Demetrios out of their way, Constantine and Thomas hoped to strengthen the Morea, by now the cultural center of the Byzantine world, and make it a safe and nearly self-sufficient principality. The philosopher
Gemistus Pletho advocated that while Constantinople was the New Rome, Mystras and the Morea could become the "New
Sparta", a centralized and strong Hellenic kingdom in its own right.
Turkish attacks and the accession of Constantine XI , restored by Thomas and his brother
Constantine to defend
the Morea in 1444 and destroyed by the
Ottomans in 1446 Among the actions taken during the brothers' project of strengthening the despotate was to reconstruct the Hexamilion wall, destroyed by the Turks in 1431. Together, they completely restored the wall, which was finished in March 1444. The wall was destroyed by the Turks again in 1446 after Constantine had attempted to expand his control northwards and had refused the sultan's demands of dismantling the wall. Constantine and Thomas were determined to hold the wall and had brought all their available forces, amounting to perhaps as many as twenty thousand men, to defend it. Despite this, the battle by the wall in 1446 was an overwhelming Turkish victory, with Constantine and Thomas barely escaping with their lives. Turahan Bey was sent south to take Mystras and devastate Constantine's lands while Sultan Murad II led his forces in the north of the Peloponnese. Although Turahan failed to take Mystras, this was of little consequence as Murad did not wish to conquer the Morea at the time, merely to instill terror, and the Turks soon left the peninsula, devastated and depopulated. Constantine and Thomas were in no position to ask for a truce and were forced to accept Murad as their lord and pay him tribute, promising to never again restore the Hexamilion wall. Their former co-despot Theodore died in June 1448, and on 31 October of the same year, Emperor John VIII died. The potential successors to the throne were Constantine, Demetrios and Thomas. John had not formally designated an heir, though everyone knew he favored Constantine and ultimately, the will of their mother,
Helena Dragaš (who also preferred Constantine), prevailed. Both Thomas, who had no intention of claiming the throne, and Demetrios, who most certainly did, hurried to Constantinople and reached the capital before Constantine. Though Demetrios was favored by many due to his anti-unionist sentiment, Helena reserved her right to act as regent until her eldest son, Constantine arrived, stalling Demetrios's attempt at seizing the throne. Thomas accepted Constantine's appointment and Demetrios, who soon thereafter joined in proclaiming Constantine as his new emperor, was overruled. Byzantine historian and Palaiologos loyalist
George Sphrantzes then informed Sultan Murad II, who also accepted the ascension of Constantine, now Emperor Constantine XI. In order to remove Demetrios from the capital and its vicinity, Constantine made Demetrios Despot of the Morea, to rule the despotate together with Thomas. Demetrios was granted Mystras and primarily ruled the southern and eastern parts of the despotate, with Thomas ruling
Corinthia and the north-west, variously using Patras or
Leontari as his capital. In 1451, Sultan Murad II, by then old and tired and having let go of all intentions of conquering Constantinople, died and was succeeded as sultan by his young and vigorous son
Mehmed II, who was determined above all else to take the city. In 1452, during the preparation stages of the Ottoman siege of Constantinople, Constantine XI sent an urgent message to the Morea, requesting that one of his brothers bring their forces to help him defend the city. To prevent aid coming from the Morea, Mehmed II sent Turahan Bey to devastate the peninsula once more. The Turkish attack was repelled by an army commanded by
Matthaios Asan, brother-in-law of Demetrios, but this victory came too late to offer any aid to Constantinople.
Continued rule in the Morea Initial tenure under Ottoman rule 1450, showing the areas under control by Thomas and his brother
Demetrios Constantinople ultimately
fell on 29 May 1453, Constantine XI dying in its defense, ending the
Byzantine Empire. In the aftermath of Constantinople's fall, and Constantine XI's death in defense of it, one of the most pressing threats to the new Ottoman regime was the possibility that one of Constantine XI's surviving relatives would find a following and return to reclaim the empire. Luckily for Mehmed II, the two despots in the Morea represented scarcely more than a nuisance and were allowed to keep their titles and lands. When emissaries of Thomas and Demetrios visited the Sultan at
Adrianople some months after Constantinople's fall, the Sultan demanded no surrender of territory, only that the despots were to pay an annual tribute of 10,000 ducats. Because the Morea was allowed to continue to exist, many Byzantine refugees fled to the despotate, which made it somewhat of a Byzantine government-in-exile. Some of these influential refugees and courtiers even raised the idea of proclaiming Demetrios, the elder brother, as the Emperor of the Romans and the legitimate successor of Constantine XI. Both Thomas and Demetrios might have considered making their small despotate the rallying point of a campaign to restore the empire, with considerable fertile and wealthy territory under the despotate's control, there did seem for a moment to be a possibility that the empire could live on in the Morea. However, Thomas and Demetrios were never able to cooperate and spent most of their resources fighting each other rather than preparing for a struggle against the Turks. Since Thomas had spent most of his life in the Morea, and Demetrios most of his life elsewhere, the two brothers hardly knew each other. Shortly after Constantinople fell, a revolt broke out against the despots in the Morea, prompted by the many Albanian immigrants to the region being unhappy with the actions of the local Greek landowners. The Albanians had respected earlier despots, such as Constantine and Theodore, but despised the two current despots and without central authority from Constantinople, they saw their opportunity to gain control of the despotate for themselves. In Thomas's part of the despotate, the rebels chose to proclaim
John Asen Zaccaria, son of the last
Prince of Achaea, as their leader and in Demetrios's part of the despotate, the leader of the revolt was
Manuel Kantakouzenos, grandson of
Demetrios I Kantakouzenos (who had served as despot until 1384) and great-great-grandson of Emperor
John VI Kantakouzenos (1347–1354). With no hope of defeating the Albanians on their own, the despots appealed to the only power near enough and strong enough to aid them; the Ottomans. Mehmed II did not wish to see the despotate pass into the hands of Albanians, and out of his control, and sent an army to quell the rebellion in December 1453. The rebellion was not fully crushed until October 1454, when Turahan Bey arrived to aid the despots in firmly establishing their authority in the region. In return for the aid, Mehmed demanded a heavier tribute from Thomas and Demetrios, amounting to 12,000 ducats annually rather than the previous 10,000.
The possibility of Western aid , sent as an envoy to the West by Thomas in 1456 Neither brother could raise the sum demanded by the Sultan and they were divided in their policies. While Demetrios, probably the more realistic of the two, had more or less given up hope of Christian aid from the west and thought it might be best to placate the Turks, Thomas retained hope that the Papacy might yet call for a crusade to restore the Byzantine Empire. Thomas's hopes were not ridiculous; the Fall of Constantinople had been received with as much horror in Western Europe as it had been in the few remaining Byzantine territories in the East. In September 1453,
Pope Nicholas V issued the
crusading bull Etsi ecclesia Christi, which called on Christians throughout the west to take the cross and embark on a crusade to recover Constantinople. The response was enthusiastic; some of Europe's most powerful and influential rulers came forward to take the cross, including
Philip the Good of
Burgundy in February 1454 and
Alfonso the Magnanimous of
Aragon and
Naples in November 1455. Alfonso promised to personally lead a host of 50,000 men and 400 ships against the Ottomans. At
Frankfurt,
Frederick III, Holy Roman Emperor assembled a council of German princes and proposed that 40,000 men be sent to
Hungary, where the Ottomans had suffered a
crushing defeat at Belgrade in 1456. If the combined forces of Hungary, Aragon, Burgundy and the
Holy Roman Empire had been unleashed to exploit the victory at Belgrade, Ottoman control of the Balkans would have been seriously threatened. Despite the Ottomans having secured the position of the two despots in the recent Albanian uprising, the possibility of Western aid to restore Byzantine territory proved too enticing to resist. In 1456, Thomas sent
John Argyropoulos as an envoy to the West to discuss the possibility of aid for the Morea. Argyropolous had been a carefully thought-out choice since he had been an ardent supporter of the
Council of Florence, which meant that he was well received by Pope Nicholas V's successor,
Pope Callixtus III, in Rome. From Rome, Argyropoulos also moved on to
Milan,
England and
France and further envoys were sent to Aragon (because of Alfonso's involvement in the crusading plans) and Venice (since Thomas were hoping that he could secure refuge in Venetian territory in the event of an Ottoman attack on the Morea). A crusade seemed so imminent that even the decidedly anti-Western Demetrios softened his anti-Latin stance and sent envoys of his own. Argyropoulos probably arrived in Rome at around the same time as Demetrios's envoy,
Frankoulios Servopoulos, and the two envoys travelled through Europe, visiting the same courts, independently of each other. Thomas and Demetrios proved to be incapable of working together even with foreign diplomacy.
Moreot civil war and the fall of the Morea , Thomas's seat as despot from 1449 until it was taken by the Ottomans in 1458 In the end, no crusade ever set out to combat the Ottomans. Due to their conviction that help would arrive, and being unable to pay, the two despots had not paid their annual tribute to the Ottomans for three years. With no money coming from the Morea, and the looming threat of Western aid, Mehmed eventually lost his patience with the Palaiologoi. The Ottoman army marched from Adrianople in May 1458 and entered the Morea, where the only real resistance was faced at
Corinth, within the domain governed by Demetrios. Leaving his artillery to bombard and besiege that city, Mehmed left with most of his army to devastate and conquer the northern parts of the despotate, under Thomas's jurisdiction. Corinth at last gave up in August, after several cities in the north had already surrendered, and Mehmed imposed a heavy retribution on the Morea. The territory under the two brothers was drastically reduced, Corinth,
Patras and much of the north-west of the peninsula were annexed into the Ottoman Empire and provided with Turkish governors, with the Palaiologoi only being allowed to keep the south, including the despotate's nominal capital, Mystras, on the condition that they paid their annual tribute to the sultan. Almost as soon as Mehmed had left the Morea, the two brothers began quarreling with each other again. Mehmed's victory had only increased the antagonism between Thomas and Demetrios. Demetrios had shifted to becoming even more pro-Ottoman after Mehmed had promised the despot that he would marry his daughter Helena, whereas Thomas increasingly hoped for western aid as the regions of the Morea annexed by Mehmed had been almost the entire area ruled by Thomas, including his capital of Patras. In January 1459, Thomas rebelled against Demetrios and the Ottomans, joining with a number of Albanian lords. They seized the fortress of Kalavryta and much of the land in the central Morea and besieged
Kalamata and
Mantineia, fortresses held by Demetrios. Demetrios responded by seizing Leontari and called for aid from the Turkish governors in the northern Morea. There were many attempts made to broker peace between the two brothers, such as Mehmed ordering the
Bishop of Lacedaemon to make the two swear to keep the peace, but any truce lasted only briefly. Many of the Byzantine nobles in the Morea could only look on in horror as the civil war raged on. George Sphrantzes summed up the conflict with the following words: Although Demetrios had more soldiers and resources, Thomas and the Albanians were able to appeal to the West for aid. After a successful skirmish against the Ottomans, Thomas sent 16 captured Turkish soldiers, alongside some of his armed guards, to Rome to convince the Pope that he was engaging in a holy war against the Muslims. The scheme worked and the Pope sent 300 Italian soldiers under the Milanese
condottieri Gianone da Cremona to aid Thomas. With these reinforcements, Thomas gained the upper hand and it looked as if Demetrios was about to be defeated, having retreated to the town of
Monemvasia and having sent Matthaios Asan to Adrianople to beg Mehmed for aid. Thomas's pleas to the west represented a real threat to the Ottomans, a threat made even greater through the support of the plan by the vocal Cardinal
Bessarion, a Byzantine refugee who had escaped the empire years earlier.
Pope Pius II convened a
council in 1459 in
Mantua and sent Bessarion and some others to preach for a crusade against the Ottomans throughout Europe. Determined to subjugate Greece, Mehmed decided that the destruction of the despotate and its full annexation directly into his empire was the only possible solution. The sultan assembled his army once more in April 1460 and led it in person first to Corinth and then on to Mystras. Although Demetrios had ostensibly been on the sultan's side, Mehmed invaded Demetrios's territory first. Demetrios surrendered to the Ottomans without a fight, fearing retribution and already having sent his family to safety in Monemvasia. Mystras thus fell into Ottoman hands on 29 May 1460, exactly seven years after Constantinople's fall. The few places in the Morea that dared resist the Sultan's army were devastated as per Islamic law, the men being massacred and the women and children being taken away. As large numbers of Greek refugees escaped to Venetian-held territories such as
Methoni and
Koroni, the Morea was slowly subdued, the last resistance being led by Constantine
Graitzas Palaiologos, a relative of Thomas and Demetrios, at
Salmenikon in July 1461.
Life in exile in front of
St. Peter's Basilica in
Rome. Thomas served as the model of this statue in the 1460s.|alt=|leftWhen Thomas had first heard of Mehmed's invasion, he had initially taken refuge at
Mantineia to wait and see how the invasion unfolded. Once it became clear that the Ottomans were marching towards Leontari and would soon arrive outside Mantineia, Thomas, his entourage (including other Greek nobles, such as George Sphrantzes), his wife Catherine and his children
Andreas,
Manuel and
Zoe fled to Methoni. Thomas and his companions fled to the island of
Corfu on ships provided by Venice, arriving there on 22 July 1460. Although Catherine and the children stayed on Corfu, the island was only a temporary refuge for Thomas, and the local government was unwilling to allow him to stay for too long in fear of antagonizing the Ottomans. Thomas was unsure of where to travel to next, he attempted to travel to
Ragusa, but the city's senate firmly rejected his arrival. Around the same time, Mehmed II sent messengers to Thomas to implore him to enter into a "treaty of friendship", promising him lands in return for his return to Greece. Unsure of what to do, Thomas sent emissaries to both Mehmed and the Papacy (to tell the Pope of his predicament). The envoy to Mehmed found the Sultan at
Veria and was, despite the Sultan's words, immediately arrested and put in chains along with his entourage. A few days later the envoy was set free and returned to Thomas at Corfu with a message; either Thomas was to come to Mehmed in person, or he was to send some of his children. In light of this, Thomas decided that he had no choice; the West was his only option. On 16 November 1460, he left his wife and children behind on Corfu and set sail for Italy, landing in
Ancona. In March 1461, Thomas arrived in Rome, where he hoped to convince Pope Pius II to call for a crusade. As the brother of the final Byzantine emperor, Thomas was the highest profile ruler in exile out of all the many Christians who escaped the Balkans over the course of the Ottoman conquest. Upon arriving in Rome, Thomas met with Pius II, who bestowed him with the
Golden Rose, lodging in the
Ospedale di Santo Spirito in Sassia and a pension of 300
ducats each month (for a total of 3600 annually). In addition to the papal pension, Thomas also received an additional 200 ducats a month from the cardinals and 500 ducats from the Republic of Venice, which also begged him not to return to Corfu as to not affect Venice's already tenuous relations with the Ottomans. Thomas's many followers considered the money provided to him to be barely enough to support the despot, and certainly nowhere near enough to also support themselves. The Papacy recognized Thomas as the rightful Despot of the Morea and the true heir to the Byzantine Empire, though Thomas never claimed the imperial title. 's arrival at
Ancona in 1464 by
Pinturicchio; Thomas is the figure in the blue hat in the bottom left During his stay in Rome, Thomas, on account of his "tall and handsome appearance", served as the model of the statue of Saint
Paul which to this day stands in front of
St. Peter's Basilica. On 12 April 1462, Thomas gave the supposed skull of Saint
Andrew the Apostle, a precious relic which had been in Byzantine hands for centuries, to Pius II. Its arrival was viewed as highly significant by Pius II, for Andrew was St Peter's brother and was believed to have founded the church of New Rome, Constantinople, just as Peter was believed to have founded that of old Rome. Although the union of Florence had been repudiated by the mass of the Orthodox faithful the western church remained committed to it, and the arrival in Italy of Thomas, himself a uniate Catholic, bringing the head of St Andrew and seeking the protection of St Peter's Vicar, moved Pius to stage one of those great symbolic spectacles at which the Renaissance popes excelled. The ceremony, which was hailed as a return of Andrew is depicted on Pius II's grave. In the 1460s, plans for a crusade against the Ottomans were once more underway. Pius II had made the recovery of Constantinople one of the primary goals of his pontificate and his 1459 council at Mantua had secured the promise of an army amounting to a total of 80,000 men from various of the great powers in Western Europe. Naval support for the plans was secured in 1463, when Venice formally
declared war on the Ottomans as a result of Turkish incursions into their territories in Greece. In October 1463, Pius II formally declared war on the Ottoman Empire after Mehmed had refused his suggestion of converting to Christianity. While many of the Balkan exiles in the West were happy to live out their lives in obscurity, Thomas hoped to eventually restore control over Byzantine territory. As such, he staunchly supported the crusading plans. In early 1462, Thomas left to Rome to tour Italy and drum up support for a crusade, carrying with him papal letters of
indulgence. Thomas brought with him letters by Pius II who described him as "a prince who was born to the illustrious and ancient family of the Palaiologoi ... a man who is now an immigrant, naked, robbed of everything except his lineage". Like his father Manuel II and his brother John VIII before him, Thomas's possessed a certain royal charisma and good looks, which ensured that his appeals did not fall on deaf ears. The
Mantuan ambassador to Rome described him as "a handsome man with a fine, serious look about him and a noble and quite lordly bearing" and Milanese ambassadors who encountered him in Venice wrote that Thomas was "as dignified as any man on Earth can be". Of the many courts Thomas visited, serious objections to his appeal was made only by Venice, where the
senate made it clear that they wanted nothing to do with him. Not only did they make Thomas leave the city, but they sent ambassadors to Rome to request that he not accompany the expedition because his presence would "produce terrible and incongrous scandals". The reason for Venice's wrath against Thomas might be his advances on Venetian territories during his time as despot, or the fact that his quarreling with his brother Demetrios effectively doomed the Morean despotate. Despite Thomas's hopes, no expedition set out for Greece. When the army was ready to set sail in 1464, Pius II travelled to Ancona to join the crusade, but died there on 15 August. Without Pius II's leadership, the crusade disbanded almost immediately, with all the ships returning home one by one. Upon the death of his wife in August 1462, Thomas summoned his children (who still remained at Corfu) to Rome, but they only arrived in the city after Thomas had died on 12 May 1465. Though Thomas had been largely bypassed and forgotten by the Roman elite after Pius II's death in 1464, he was buried with honor in
St. Peter's Basilica, where his grave would survive the destruction and removal of the tombs of the Palaiologan emperors in Constantinople during the early years of Ottoman rule. Modern efforts to locate his grave within the Basilica have so far proven fruitless. == Children and descendants ==