Accession to the throne in the Church of St. Demetrios in
Mystras, marking the spot where Constantine XI was supposedly crowned Theodore, once Despot of the Morea, died in June 1448 and on 31 October that same year, John VIII Palaiologos died in Constantinople. Compared to his other living brothers, Constantine was the most popular of the Palaiologoi, both in the Morea and in the capital. It was well known that John's favored successor was Constantine and ultimately, the will of Helena Dragaš (who also preferred Constantine), prevailed in the matter. Both Thomas, who appeared to have had no intention of claiming the throne, and Demetrios, who most certainly did, hurried to Constantinople and reached the capital before Constantine left the Morea. Although many favored Demetrios for his anti-unionist sentiment, Helena reserved her right to act as regent until her eldest son, Constantine arrived, and stalled Demetrios' attempt at seizing the throne. Thomas accepted Constantine's appointment and Demetrios was overruled, though he later proclaimed Constantine as his new emperor. Soon thereafter, Sphrantzes informed Sultan Murad II, who also accepted the appointment on 6 December 1448. With the issue of succession peacefully resolved, Helena sent two envoys,
Manuel Palaiologos Iagros and
Alexios Philanthropenos Laskaris, to the Morea to proclaim Constantine as emperor and bring him to the capital. Thomas also accompanied them. codex containing a copy of the
Extracts of History by
Joannes Zonaras) In a small civil ceremony at Mystras, possibly in one of the churches or in the Despot's Palace, on 6 January 1449, Constantine was proclaimed Emperor of the Romans. He was not given a crown; instead, Constantine may have put on another type of imperial headgear, a , on his head with his own hands. Although emperors were traditionally crowned in the
Hagia Sophia in Constantinople, there was historical precedent for smaller and local ceremonies: centuries ago,
Manuel I Komnenos had been given the title of emperor by his dying father,
John II Komnenos, in
Cilicia; Constantine's great-grandfather,
John VI Kantakouzenos, had been proclaimed emperor at
Didymoteicho in Thrace. Both Manuel I and John VI had been careful to perform the
traditional coronation ceremony in Constantinople once they reached the capital. In Constantine's case, no such ceremony was ever performed. Both Constantine and the Patriarch of Constantinople, Gregory III Mammas, were supporters of the Union of the Churches: a ceremony in which Gregory crowned Constantine emperor might have led the anti-unionists in the capital to rebel. Constantine's rise to emperor was controversial: although he was accepted on account of his lineage with few alternative candidates, his lack of a full coronation and support for the Union of the Churches damaged public perception of the new emperor. Careful not to anger the anti-unionists through being crowned by Gregory III, Constantine believed that his proclamation at Mystras had sufficed as an imperial coronation and had given him all the constitutional rights of the one true emperor. In his earliest known imperial document, a chrysobull from February 1449, he refers to himself as "Constantine Palaiologos in Christ true Emperor and Autocrat of the Romans". Constantine arrived at Constantinople on 12 March 1449, having been provided means of travel by a Catalan ship. Constantine was well prepared for his accession to the throne after serving as regent twice and ruling numerous fiefs throughout the crumbling empire. By Constantine's time, Constantinople was a shadow of its former glory; the city never truly recovered from the 1204
sack by the crusaders of the Fourth Crusade. Instead of the grand imperial capital it once was, 15th century Constantinople was an almost rural network of population centers, with many of the city's churches and palaces, including the former imperial palace, abandoned and in disrepair. Instead of the former imperial palace, the Palaiologoi emperors used the
Palace of Blachernae, located considerably closer to the city's walls, as their main residence. The city's population had declined significantly due to the
Latin occupation, the 14th century civil wars, and outbreaks of the
Black Death in 1347, 1409 and 1410. By the time Constantine became emperor, only about 50,000 people lived in the city.
Initial concerns '', minted 1448–1453. One of the last coins minted by the
Byzantine Empire, the coin features a bust of Constantine XI (left) and
Christ Pantocrator (right). One of Constantine's most pressing concerns was the Ottomans. One of his first acts as emperor, just two weeks after arriving in the capital, was to attempt to secure the empire by arranging a truce with Murad II. He sent an ambassador,
Andronikos Iagaris, to the sultan. Iagaris was successful, and the agreed-upon truce also included Constantine's brothers in the Morea to secure the province from further Ottoman attacks. In order to remove his rebellious brother Demetrios from the capital and its vicinity, Constantine had made Demetrios his replacement as Despot of the Morea to rule the despotate alongside Thomas. Demetrios was granted Constantine's former capital, Mystras, and given authority over the southern and eastern parts of the despotate, while Thomas ruled the northwest and
Corinthia alternating between
Patras and
Leontari as his place of residence. Constantine tried to hold numerous discussions with the anti-unionists in the capital, who had organized themselves as a
synaxis to oppose Patriarch Gregory III's authority, on account of him being a unionist. Constantine was not a fanatical unionist and merely viewed the Union of the Churches as necessary for the empire's survival. The unionists found this argument to be baseless and materialistic, believing that help would be more likely to come through trust in God than a western crusading campaign. Another pressing concern was the continuation of the imperial family as neither Constantine nor his brothers had male children at the time. In February 1449, Constantine had sent
Manuel Dishypatos as an envoy to Italy to speak with
Alfonso V of Aragon and Naples in order to secure military aid against the Ottomans and forge a marriage alliance. The intended match was the daughter of
Alfonso's nephew,
Beatrice of Coimbra, but the alliance failed. In October 1449, Constantine sent Sphrantzes to the east to visit the
Empire of Trebizond and the
Kingdom of Georgia and see if there were any suitable brides there. Sphrantzes, accompanied by a large retinue of priests, nobles, musicians and soldiers, left the capital for nearly two years. While at the court of Emperor
John IV Megas Komnenos in Trebizond, Sphrantzes was made aware that Murad II had died. Though John IV saw this as positive news, Sphrantzes was more anxious: the old sultan had grown tired and had given up all hope of conquering Constantinople. His young son and successor,
Mehmed II, was ambitious, young and energetic. Sphrantzes had the idea that the sultan could be dissuaded from invading Constantinople if Constantine married Murad II's widow,
Mara Branković. Constantine supported the idea when he received Sphrantzes' report in May 1451 and sent envoys to Serbia, where Mara had returned to after Murad II's death. Many of Constantine's courtiers opposed the idea due to a distrust of the Serbians, causing Constantine to question the viability of the match. Ultimately, the opposition of the courtiers to the marriage proved pointless: Mara had no wish to remarry, as she vowed to live a life of celibacy and chastity for the rest of her life once released from the Ottomans. Sphrantzes then decided that a Georgian bride would suit the emperor best and returned to Constantinople in September 1451, bringing a Georgian ambassador with him. Constantine thanked Sphrantzes for his efforts and they agreed that Sphrantzes was to return to Georgia in the spring of 1452 and forge a marriage alliance. Due to mounting tensions with the Ottomans, Sphrantzes ultimately did not return to Georgia. On 23 March 1450, Helena Dragaš died. She was highly respected among the Byzantines and was mourned deeply. Gemistus Pletho, the Moreot philosopher previously at Constantine's court in the Morea, and
Gennadios Scholarios, future Patriarch of Constantinople, both wrote funeral orations praising her. Pletho praised Helena's fortitude and intellect, and compared her to legendary Greek heroine
Penelope on account of her prudence. Constantine's other advisors were often at odds with the emperor and each other. Her death left Constantine unsure of which advisor to rely on the most.
Andronikos Palaiologos Kantakouzenos, the
megas domestikos (or commander-in-chief), disagreed with the emperor on a number of matters, including the decision to marry a Georgian princess instead of an imperial princess from Trebizond. The most powerful figure at the court was Loukas Notaras, an experienced statesman and
megas doux (commander-in-chief of the navy). Although Sphrantzes disliked Notaras, he was a close friend of Constantine. As the Byzantine Empire no longer had a navy, Notaras' position was more of an informal prime minister-type role than a position of military command. Notaras believed that Constantinople's massive defenses would stall any attack on the city and allow western Christians to aid them in time. Due to his influence and friendship with the emperor, Constantine was likely influenced by his hopes and ideas. Sphrantzes was promoted to "First Lord of the Imperial Wardrobe": his office gave him near unhindered access to the imperial residence and a position to influence the emperor. Sphrantzes was even more cautious towards the Ottomans than Notaras, and believed the
megas doux risked antagonizing the new sultan. Although Sphrantzes also approved of appealing to the west for aid, he believed that any appeals had to be highly discreet in order to avoid Ottoman attention.
Search for allies in 1450 Shortly after Murad II's death, Constantine was quick to send envoys to the new Sultan Mehmed II in an attempt to arrange a new truce. Mehmed supposedly received Constantine's envoys with great respect and put their minds to rest through swearing by
Allah, the Prophet
Muhammad, the
Quran, and the
angels and
archangels that he would live in peace with the Byzantines and their emperor for the rest of his life. Constantine was unconvinced and suspected that Mehmed's mood could abruptly change in the future. In order to prepare for the future possibility of Ottoman attack, Constantine needed to secure alliances and the most powerful realms that might be inclined to aid him were in the West. The nearest and most concerned potential ally was Venice, which operated a large commercial colony in their quarter of Constantinople. However, the Venetians were not to be trusted. During the first few months of his rule as emperor, Constantine had raised the taxes on the goods the Venetians imported to Constantinople since the imperial treasury was nearly empty and funds had to be raised through some means. In August 1450, the Venetians had threatened to transfer their trade to another port, perhaps one under Ottoman control, and despite Constantine writing to the
Doge of Venice,
Francesco Foscari, in October 1450, the Venetians were unconvinced and signed a formal treaty with Mehmed II in 1451. To annoy the Venetians, Constantine attempted to seal a deal with the
Republic of Ragusa in 1451, offering them a place to trade in Constantinople with limited tax concessions, though the Ragusans could offer little military aid to the empire. Most of the kingdoms in Western Europe were occupied with their own wars at the time and the crushing defeat at the Battle of Varna had quelled most of the crusading spirit. The news that Murad II had died and been succeeded by his young son also lulled the western Europeans into a false sense of security. To the papacy, the Union of the Churches was a far more pressing concern than the threat of Ottoman attack. In August 1451, Constantine's ambassador
Andronikos Bryennios Leontaris arrived in Rome to deliver a letter to
Pope Nicholas V, which contained a statement from the anti-unionist
synaxis at Constantinople. Constantine hoped that the Pope would read the letter and understand Constantine's difficulties with making the Union of the Churches a reality in the east. The letter contained the
synaxis's proposal that a new council be held at Constantinople, with an equal number of representatives from both churches (since the Orthodox had been heavily outnumbered at the previous council). On 27 September, Nicholas V replied to Constantine after he heard that the unionist Patriarch Gregory III had resigned following the opposition against him. Nicholas V merely wrote that Constantine had to try harder to convince his people and clergy and that the price of further military aid from the west was full acceptance of the union achieved at Florence; the name of the Pope had to be commemorated in the churches in Greece and Gregory III had to be reinstated as patriarch. The ultimatum was a setback for Constantine, who had done his best to enforce the union without inciting riots in Constantinople. The Pope appeared to have completely ignored the sentiment of the anti-unionist
synaxis. Nicholas V sent a
papal legate, Cardinal
Isidore of Kiev, to Constantinople to attempt to help Constantine enforce the union, but Isidore did not arrive until October 1452, when the city faced more pressing concerns.
Dealings with Mehmed II by
Gentile Bellini (1480) A great-grandson of Ottoman Sultan
Bayezid I,
Orhan Çelebi, lived as a hostage in Constantinople. Other than Mehmed II, Orhan was the only known living male member of the Ottoman dynasty, and thus was a potential rival claimant to the sultanate. Mehmed had previously agreed to pay annually for Orhan being kept at Constantinople, but in 1451, Constantine sent a message to the sultan complaining that the payment was not sufficient and hinted that unless more money was paid, Orhan might be released, possibly sparking an Ottoman civil war. The strategy of attempting to use hostage Ottoman princes had been used before by Constantine's father Manuel II, but it was a risky one. Mehmed's grand vizier,
Çandarlı Halil Pasha, received the message at
Bursa and was appalled at the threat, considering the Byzantine to be inept. Halil had long been relied upon by the Byzantines, through bribes and friendship, to maintain peaceful relations with the Ottomans, but his influence over Mehmed was limited and he was ultimately loyal to the Ottomans, not the Byzantines. Because of the blatant provocation to the sultan, he lost his temper with the Byzantine messengers, supposedly shouting: Constantine and his advisors had catastrophically misjudged the determination of the new sultan. Throughout his brief reign, Constantine and his advisors had been unable to form an effective foreign policy towards the Ottoman Empire. Constantine mainly continued the policy of his predecessors, doing what he could to brace Constantinople for attack, but also alternated between supplicating and confronting the Ottomans. Constantine's advisors had little knowledge and expertise on the Ottoman court and disagreed in how to deal with the Ottoman threat and as Constantine wavered between the opinions of his different councillors, his policy towards Murad and Mehmed was not coherent and resulted in disaster. Mehmed II considered Constantine to have broken the terms of their 1449 truce and quickly revoked the small concessions he had given to the Byzantines. The threat of releasing Orhan gave Mehmed a pretext for concentrating all of his efforts on seizing Constantinople, his true goal since he had become sultan. Mehmed believed that the conquest of Constantinople was essential to the survival of the Ottoman state: by taking the city, he would prevent any potential crusade from using it as a base and prevent it falling into the hands of a rival more dangerous than the Byzantines. Furthermore, Mehmed had an intense interest in ancient Greco-Roman and medieval Byzantine history, his childhood heroes being figures like
Achilles and
Alexander the Great. castle, seen from the
Bosphorus strait Mehmed began preparations immediately. In the spring of 1452, work had begun on the
Rumelihisarı castle, constructed on the western side of the
Bosporus strait, opposite to the already existing
Anadoluhisarı castle on the eastern side. With the two castles, Mehmed could control sea traffic in the Bosporus and could blockade Constantinople both by land and sea. Constantine, horrified by the implications of the construction project, protested that Mehmed's grandfather Mehmed I had respectfully asked the permission of Emperor Manuel II before constructing the eastern castle and reminded the sultan of their existing truce. Based on his actions in the Morea, especially during at the time of the Crusade of Varna, Constantine was clearly anti-Turkish and he preferred himself to take aggressive action against the Ottoman Empire; his attempts to appeal to Mehmed were simply a stalling tactic. Mehmed's response to Constantine was that the area he built the fortress on had been uninhabited and that Constantine owned nothing outside of Constantinople's walls. As panic ensued in Constantinople, the Rumelihisarı was completed in August 1452, intended not only to serve as a means to blockade Constantinople but also as the base from which Mehmed's conquest of Constantinople was to be directed. To clear the site of the new castle, some local churches were demolished, which angered the local Greek populace. The Ottomans had sent some animals to graze on Byzantine farmland on the shores of the
Sea of Marmara, which also angered the locals. Outraged, Constantine formally declared war on Mehmed II, closing the gates of Constantinople and arresting all Turks within the city walls. Seeing the futility in this move, Constantine renounced his actions three days later and set the prisoners free. After the capture of several Italian ships and the execution of their crews during Mehmed's eventual siege of Constantinople, Constantine reluctantly ordered the execution of all Turks within the city walls. Constantine began to prepare for what was at best a blockade, and at worst a siege, gathering provisions and working to repair Constantinople's walls. Manuel Palaiologos Iagros, one of the envoys who had invested Constantine as emperor in 1449, was put in charge of the restoration of the formidable walls, a project which was completed late in 1452. He sent more urgent requests for aid to the west. Near the end of 1451, he had sent a message to Venice stating that unless they sent reinforcements to him at once, Constantinople would fall to the Ottomans. Although the Venetians were sympathetic to the Byzantine cause, they explained in their reply in February 1452 that although they could ship armor and gunpowder to him, they had no troops to spare as they were fighting against neighboring city-states in Italy at the time. When the Ottomans sank a Venetian trading ship in the Bosporus in November 1452 and executed the ship's survivors on account of the ship refusing to pay a new toll instituted by Mehmed, the Venetian attitude changed as they now also found themselves at war with the Ottomans. Desperate for aid, Constantine sent pleas for reinforcements to his brothers in the Morea and Alfonso V of Aragon and Naples, promising the latter the island of Lemnos if he brought help. The Hungarian warrior
John Hunyadi was invited to help and was promised Selymbria or Mesembria if he came with aid. The Genoese on the island Chios were also sent a plea, being promised payment in return for military assistance. Constantine received little practical response to his pleas.
Religious disunity in Constantinople , sent as a
papal legate to
Constantinople in October 1452 Above all, Constantine sent many appeals for aid to
Pope Nicholas V. Although sympathetic, Nicholas V believed that the papacy could not go to the rescue of the Byzantines unless they fully accepted the Union of the Churches and his spiritual authority. Furthermore, he knew that the papacy alone could not do much against the formidable Ottoman Turks, a similar response to one given by Venice, which promised military assistance only if others in Western Europe also came to Constantinople's defense. On 26 October 1452, Nicholas V's legate,
Isidore of Kiev, arrived at Constantinople together with the
Latin Archbishop of Mytilene,
Leonard of Chios. With them, they brought a small force of 200 Neapolitan archers. Though they made little difference in coming battle, the reinforcements were probably more appreciated by Constantinople's citizens than the actual purpose of Isidore's and Leonard's visit: cementing the Union of the Churches. Their arrival in the city spurred the anti-unionists into a frenzy. On 13 September 1452, a month before Isidore and Leonard arrived, the lawyer and anti-unionist
Theodore Agallianos had written a short chronicle of contemporary events, concluding with the following words: Constantine and his brother
John VIII before him had badly misjudged the level of opposition against the church union.
Loukas Notaras was successful in calming down the situation in Constantinople somewhat, explaining to an assembly of nobles that the Catholic visit was made with good intentions and that the soldiers who had accompanied Isidore and Leonard might just be an advance guard; more military aid might have been on its way. Many nobles were convinced that a spiritual price could be paid for material rewards and that if they were rescued from the immediate danger, there would be time later to think more clearly in a calmer atmosphere.
George Sphrantzes suggested to Constantine that he name Isidore as the new
Patriarch of Constantinople as
Gregory III had not been seen for some time and was unlikely to return. Although such an appointment might have gratified the pope and led to further aid being sent, Constantine realized that it would only stir up the anti-unionists more. Once the people of Constantinople realized that no further immediate aid in addition to the 200 soldiers was coming from the papacy, they rioted in the streets. Leonard of Chios confided in the emperor that he believed him to be far too lenient with the anti-unionists, urging him to arrest their leaders and try harder to push back the opposition to the Union of the Churches. Constantine opposed the idea, perhaps under the assumption that arresting the leaders would turn them into martyrs for their cause. Instead, Constantine summoned the leaders of the
synaxis to the imperial palace on 15 November 1452, and once again asked them to write a document with their objections to the union achieved at Florence, which they were eager to do. On 25 November, the Ottomans sank another Venetian trading ship with cannon fire from the new Rumelihisarı castle, an event which captured the minds of the Byzantines and united them in fear and panic. As a result, the anti-unionist cause gradually died down. On 12 December, a Catholic
liturgy commemorating the names of the Pope and Patriarch Gregory III was held in the
Hagia Sophia by Isidore. Constantine and his court were present, as was a large number of the city's citizens (Isidore stated that all of its inhabitants attended the ceremony).
Final preparations and his army approaching
Constantinople, by
Fausto Zonaro (1903) Constantine's brothers in the Morea could not bring him any help: Turahan had been called on by Mehmed to invade and devastate the Morea again in October 1452 to keep the two despots occupied. The Morea was devastated, with Constantine's brothers only achieving one small success with the capture of Turahan's son,
Ahmed, in battle. Constantine then had to rely on the only other parties which had expressed interest in aiding him: Venice, the pope, and Alfonso V of Aragon and Naples. Although Venice had been slow to act, the Venetians in Constantinople acted immediately without waiting for orders when the Ottomans sank their ships. The Venetian
bailo in Constantinople,
Girolamo Minotto, called an emergency meeting with the Venetians in the city, which was also attended by Constantine and Cardinal Isidore. Most of the Venetians voted to stay in Constantinople and aid the Byzantines in their defense of the city, agreeing that no Venetian ships were to leave Constantinople's harbor. The decision of the local Venetians to stay and die for the city had a significantly greater effect on the Venetian government than Constantine's pleas. In February 1453, Doge Foscari ordered the preparation of warships and army recruitment, both of which were to head for Constantinople in April. He sent letters to the pope, Alfonso V of Aragon and Naples, King
Ladislaus V of Hungary, and the Holy Roman Emperor
Frederick III to inform them that unless Western Christianity acted, Constantinople would fall to the Ottomans. Though the increase in diplomatic activity was impressive, it came too late to save Constantinople: the equipment and financing of a joint papal-Venetian armada took longer than expected, the Venetians had misjudged the amount of time on their hands, and messages took at least a month to travel from Constantinople to Venice. Emperor Frederick III's only response to the crisis was a letter sent to Mehmed II in which he threatened the sultan with an attack from all of western Christendom unless the sultan demolished the Rumelihisarı castle and abandoned his plans to Constantinople. Constantine continued to hope for help and sent more letters in early 1453 to Venice and Alfonso V, asking not only for soldiers but also food as his people were beginning to suffer from the Ottoman blockade of the city. Alfonso responded to his plea by quickly sending a ship with provisions. Throughout the long winter of 1452–1453, Constantine ordered the citizens of Constantinople to restore the city's imposing walls and gather as many weapons as they could. Ships were sent to the islands still under Byzantine rule to gather further supplies and provisions. The defenders grew anxious as the news of a huge cannon at the Ottoman camp that was assembled by the Hungarian engineer
Orban reached the city. Loukas Notaras was given command of the walls along the sea walls of the
Golden Horn and various sons of the Palaiologos and
Kantakouzenos families were appointed to man other positions. Many of the city's foreign inhabitants, notably the Venetians, offered their aid. Constantine asked them to man the battlements to show the Ottomans how many defenders they were to face. When the Venetians offered their service to guard four of the city's land gates, Constantine accepted and entrusted them with the keys. Some of the city's Genoese population also aided the Byzantines. In January 1453, notable Genoese aid arrived voluntarily in the form of
Giovanni Giustiniani—a renowned soldier known for his skill in siege warfare—and 700 soldiers under his command. Giustiniani was appointed by Constantine as the general commander for the walls on Constantinople's land side. Giustiniani was given the rank of
protostrator and promised the island of Lemnos as a reward (though it had already been promised to Alfonso V of Aragon and Naples, should he come to the city's aid). In addition to the limited western aid, Orhan Çelebi, the Ottoman contender held as a hostage in the city, and his considerable retinue of Ottoman troops, also assisted in the city's defense. On 2 April 1453, Mehmed's advance guard arrived outside Constantinople and began pitching up a camp. On 5 April, the sultan himself arrived at the head of his army and encamped within firing range of the city's
Gate of St. Romanus. Bombardment of the city walls began almost immediately on 6 April. Most estimates of the number of soldiers defending Constantinople's walls in 1453 range from 6,000 to 8,500, out of which 5,000–6,000 were Greeks, most of whom were untrained militia soldiers. An additional 1,000 Byzantine soldiers were kept as reserves inside the city. Mehmed's army massively outnumbered the Christian defenders; his forces might have been as many as 80,000 men, including about 5,000 elite
janissaries. Even then, Constantinople's fall was not inevitable; the strength of the walls made the Ottoman numerical advantage irrelevant at first and under other circumstances, the Byzantines and their allies could have survived until help arrived. The Ottoman use of cannons intensified and sped up the siege considerably. == Fall of Constantinople ==