Manuel II Palaiologos in the context of "Helena Dragaš"

Constantine XI Dragases Palaiologos or Dragaš Palaeologus (Greek: Κωνσταντῖνος Δραγάσης Παλαιολόγος, romanized: Kōnstantīnos Dragásēs Palaiológos; 8 February 1404 – 29 May 1453) was the last reigning Byzantine emperor from 23 January 1449 until his death in battle at the fall of Constantinople on 29 May 1453. Constantine's death marked the definitive end of the Eastern Roman Empire, which traced its origin to Constantine the Great's foundation of Constantinople as the Roman Empire's new capital in 330.

Constantine was the fourth son of Emperor Manuel II Palaiologos and Serbian noblewoman Helena Dragaš. Little is known of his early life, but from the 1420s onward, he repeatedly demonstrated great skill as a military general. Based on his career and surviving contemporary sources, Constantine appears to have been primarily a soldier. This does not mean that Constantine was not also a skilled administrator: he was trusted and favored to such an extent by his older brother, Emperor John VIII Palaiologos, that he was designated as regent twice during John VIII's journeys away from Constantinople in 1423–1424 and 1437–1440. In 1427–1428, Constantine and John fended off an attack on the Morea (the Peloponnese) by Carlo I Tocco, ruler of Epirus, and in 1428 Constantine was proclaimed Despot of the Morea and ruled the province together with his older brother Theodore and his younger brother Thomas. Together, they extended Roman rule to cover almost the entire Peloponnese for the first time since the Fourth Crusade more than two hundred years before and rebuilt the ancient Hexamilion wall, which defended the peninsula from outside attacks. Although ultimately unsuccessful, Constantine personally led a campaign into Central Greece and Thessaly in 1444–1446, attempting to extend Byzantine rule into Greece once more.

Flavius Julius Constans (c. 323 – 350), also called Constans I, was Roman emperor from 337 to 350. He held the imperial rank of caesar from 333, and was the youngest son of Constantine the Great.

After his father's death, he was made augustus alongside his brothers in September 337. Constans was given the administration of the praetorian prefectures of Italy, Illyricum, and Africa. He defeated the Sarmatians in a campaign shortly afterwards. Quarrels over the sharing of power led to a civil war with his eldest brother and co-emperor Constantine II, who invaded Italy in 340 and was killed in battle by Constans's forces near Aquileia. Constans gained from him the praetorian prefecture of Gaul. Thereafter there were tensions with his remaining brother and co-augustus Constantius II (r. 337–361), including over the exiled bishop Athanasius of Alexandria, who in turn eulogized Constans as "the most pious Augustus... of blessed and everlasting memory." In the following years he campaigned against the Franks, and in 343 he visited Roman Britain, the last legitimate emperor to do so until Manuel II in 1400, more than a thousand years later.

Pendilia (singular pendilium; from Latin pendulus, hanging) or pendoulia (the Greek equivalent), are pendants or dangling ornaments hanging from a piece of metalwork such as a crown, votive crown, crux gemmata, or kamelaukion, and are a feature of Early Medieval goldsmith work. On crosses the pendilia may include the letters alpha and omega, and on votive offerings, which were often designed to be hung over altars and where pendilia are at their largest and most spectacular, they may spell out whole words (see illustration).

The term is commonly used in coin collecting. Pendilia are depicted on coins as jewels or pearls hanging from the sides of the crown, and occur frequently on coins of Byzantine emperors. The pendilia which hung from the Emperors' crowns began with Marcian. Although the years saw the styles of crown change, the pendilia remained, at least through Manuel II Palaiologos. Surviving crowns with pendilia include the Holy Crown of Hungary and many votive crowns of the Treasure of Guarrazar from Visigothic Spain.

Demetrios Palaiologos or Demetrius Palaeologus (Greek: Δημήτριος Παλαιολόγος, romanized: Dēmētrios Palaiologos; 1407–1470) was Despot of the Morea together with his brother Thomas from 1449 until the fall of the despotate in 1460. Demetrios and Thomas were sons of Byzantine Emperor Manuel II Palaiologos, and brothers of the final two emperors John VIII and Constantine XI. Demetrios had a complicated relationship with his brothers, whom he frequently quarrelled with, usually over the matter of Demetrios's wish to establish himself as the most senior of them and claim the imperial throne for himself.

In 1437, Demetrios accompanied his elder brother John VIII to the Council of Florence, the main objective of which was to unify the Roman Catholic and Eastern Orthodox churches so that Western Europe might be more inclined to lend military aid to the desperate Byzantine Empire. Even though Demetrios was staunchly against a union of the churches, he was brought along as John did not dare to leave him in the east without he himself being present. Demetrios attempted to claim the throne twice, first attempting to take it with Ottoman support in 1442 and then by hoping to be proclaimed emperor after John VIII's death in 1448. Both attempts failed and in 1449, Demetrios was proclaimed as Despot of the Morea by the new emperor, his brother Constantine XI.

Andronikos Palaiologos or Andronicus Palaeologus (Greek: Ἀνδρόνικος Παλαιολόγος) was a Byzantine prince and the last Byzantine governor of Thessalonica with the title of despot (despotēs), from 1408 to 1423.

Andronikos Palaiologos was a son of the Byzantine Emperor 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 Theodore II Palaiologos, Demetrios Palaiologos and Thomas Palaiologos, who ruled as despots in Morea.

The siege of Constantinople in 1394–1402 was a long blockade of the capital of the Byzantine Empire by the Ottoman Sultan Bayezid I. Already in 1391, the rapid Ottoman conquests in the Balkans had cut off the city from its hinterland. After constructing the fortress of Anadoluhisarı to control the Bosporus strait, Bayezid tried to starve the city into submission by blockading it both by land and, less effectively, by sea.

The Crusade of Nicopolis was launched to relieve the city, but it was decisively defeated by the Ottomans. In 1399, a French expeditionary force under Marshal de Boucicaut arrived, but was unable to achieve much. The situation became so dire that in December 1399 the Byzantine emperor, Manuel II Palaiologos, left the city to tour the courts of Western Europe in a desperate attempt to secure military aid. The emperor was welcomed with honours, but secured no definite pledges of support. The city was relieved when Bayezid had to confront the invasion of Timur in 1402. Bayezid's defeat in the Battle of Ankara in 1402 and the subsequent Ottoman civil war enabled the Byzantines to regain some lost territories in the Treaty of Gallipoli.

Between 1399 and 1403, the Byzantine Emperor, Manuel II, undertook a journey to Western Europe to obtain military support from Western powers. Promoted and aided by his friend, Jean II Le Maingre (known as "Boucicaut"), Manuel II visited various Western courts starting in Italy, and then moving to France and later England. He stayed in Paris for some time and received promises of aid, as he did in other European capitals, which ultimately did not materialize.

The news of the defeat of Bayezid, the greatest threat to the Byzantine Empire, at the hands of Timur at the Battle of Ankara, ultimately made his journey unnecessary, and Manuel II returned to Constantinople in 1403. Although Manuel II obtained a reprieve for the survival of his Empire, the journey already foreshadowed the scant Western support for his cause, which would be again demonstrated during the Fall of Constantinople in 1453, as Western Europe turned away from the East.

Guarino Veronese or Guarino da Verona (1374 – 14 December 1460) was an Italian classical scholar, humanist, and translator of ancient Greek texts during the Renaissance. In the republics of Florence and Venice he studied under Manuel Chrysoloras (c. 1350–1415), renowned professor of Greek and ambassador of the Byzantine emperor Manuel II Palaiologos, the first scholar to hold such courses in medieval Italy.