Interior of the monastery church at Daphne Greece, 11th century, crowned with a Byzantine dome mosaic of Christ Pantocrator.Rene Percheron-J.P. Ziolo
The revival of mystical speculation and the monastic life may have been in part a reaction against the contemporary revival of secular literature and learning. Scholarship of all kinds was patronized by Andronicus II. As in the 11th century, interest was mainly centred on a rediscovery of ancient Greek learning. The scholar Maximus Planudes compiled a famous anthology and translated a number of Latin works into Greek, though knowledge of Latin was rare and most of the Byzantine scholars prided themselves on having in their Hellenic heritage an exclusive possession that set them apart from the Latins. A notable exception was Demetrius Cydones who, like Michael Psellus, managed affairs of state for a number of emperors for close to 50 years. Cydones translated the works of Thomas Aquinas into Greek; he was the forerunner of a minority of Byzantine intellectuals who joined the Roman Church and looked to the West to save their empire from ruin. More typical of his class was Theodore Metochites, the Grand Logothete, or chancellor, of Andronicus II, whose encyclopaedic learning rivaled that of Psellus. His pupil Nicephorus Gregoras, in addition to his researches in philosophy, theology, mathematics, and astronomy, wrote a history of his age. The tradition of Byzantine historiography, maintained by George Acropolites, the historian of the Empire of Nicaea, was continued in the 14th century by George Pachymeres, by Gregoras, and finally by the emperor John VI Cantacuzenus, who wrote his memoirs after his abdication in 1354. Andronicus III and John Cantacuzenus
The histories they wrote tell more of politics and personalities than of the underlying social and economic tensions in their society that were to find expression in a series of civil wars. Trouble broke out in 1320 when Andronicus II, purely for family reasons, disinherited his grandson Andronicus III. The cause of the young emperor was taken up by his friends, and there was periodic warfare from 1321 to 1328, when the older Andronicus had to yield the throne. It was in some ways a victory for the younger generation of the aristocracy, of whom the leading light was John Cantacuzenus. It was he who guided the empire’s policies during the reign of Andronicus III (1328–41). They were men of greater drive and determination, but the years of fighting had made recovery still more difficult and had given new chances to their enemies. In 1329 they fought and lost a battle at Pelekanon (near Nicomedia) against Osman’s son, Orhan, whose Turkish warriors went on to capture Nicaea in 1331 and Nicomedia in 1337. Northwestern Anatolia, once the heart of the empire, was now lost. There seemed no alternative but to accept the fact and to come to terms with the Ottomans and the other Turkish emirs. By so doing, Andronicus III and Cantacuzenus were able to call on the services of almost limitless numbers of Turkish soldiers to fight for them against their other enemies: the Italians in the Aegean islands and the Serbs and the Bulgars in Macedonia and Thrace.
The power of Serbia, which Andronicus II had managed to control by diplomatic means, grew alarmingly after the accession of Stefan Dušan to the Serbian throne in 1331. Dušan exploited to the full the numerous embarrassments of the Byzantines and in 1346 announced his ambitions by having himself crowned as emperor of the Serbs and Greeks. The greatest practical achievement of Andronicus III was the restoration to Byzantine rule of the long-separated provinces of Epirus and Thessaly. But only a few years later, in 1348, the whole of northern Greece was swallowed up in the Serbian Empire of Stefan Dušan.
When Andronicus III died in 1341, civil war broke out for a second time. The contestants on that occasion were John Cantacuzenus, who had expected to act as regent for the boy-heir John V, and his political rivals led by his former partisan Alexius Apocaucus, the patriarch John Calecas, and the empress mother Anne of Savoy, who held power in Constantinople. Cantacuzenus, befriended and then rejected by Dušan of Serbia, was crowned as Emperor John VI in Thrace in 1346; and, with the help of Turkish troops, he fought his way to victory in the following year. Like Romanus Lecapenus, he protested that he was no more than the protector of the legitimate heir to the throne, John V Palaeologus. His brief reign, from 1347 to 1354, might have turned the tide of Byzantine misfortunes had not the second civil war provoked unprecedented social and political consequences. In the cities of Thrace and Macedonia the people vented their dissatisfaction with the ruling aristocracy by revolution. It was directed mainly against Cantacuzenus and the class that he represented. The movement was most memorable and lasting in Thessalonica, where a faction known as the Zealots seized power in a coup d’état and governed the city as an almost independent commune until 1350.
The second civil war was consequently even more destructive of property and ruinous to the economy than the first. At the same time, in 1347, the Black Death decimated the population of Constantinople and other parts of the empire. John VI Cantacuzenus, nevertheless, did what he could to restore the economy and stability of the empire. To coordinate the scattered fragments of its territory he assigned them as appanages to individual members of the imperial family. His son Manuel took over the province of the Morea in 1349 with the rank of despot and governed it with growing success until his death in 1380; his eldest son, Matthew, was given a principality in Thrace; while the junior emperor John V, who had married a daughter of Cantacuzenus, ruled in Thessalonica after 1351.
Cantacuzenus also tried but failed to weaken the economic stranglehold of the Genoese by rebuilding a Byzantine war fleet and merchant navy. The effort involved him in warfare, first on his own and then as an unwilling partner of the Venetians against the Genoese, from which Byzantium emerged as the loser. The revenue of the Genoese colony at Galata, derived from custom dues, was now far greater than that of Constantinople. The empire’s poverty was reflected in dilapidated buildings and falling standards of luxury. The crown jewels had been pawned to Venice during the civil war, and the Byzantine gold coin, hopelessly devalued, had given place in international trade to the Venetian ducat. More and more, Byzantium was at the mercy of its foreign competitors and enemies, who promoted and exploited the political and family rivalries among the ruling class. John Cantacuzenus was never popular as an emperor, and feeling against him came to a head when some of his Ottoman mercenaries took the occasion of the destruction of Gallipoli by earthquake to occupy and fortify the city in March 1354. It was their first permanent establishment in Europe, at the key point of the crossing from Asia. In November of the same year John V Palaeologus, encouraged by the Anti-Cantacuzenist Party, forced his way into Constantinople. In December Cantacuzenus abdicated and became a monk. Though his son Matthew, who had by then been crowned as coemperor, fought on for a few years, the dynasty of Cantacuzenus was not perpetuated. Turkish expansion
John Cantacuzenus’ relationship with the Turks had been based on personal friendship with their leaders, among them Orhan, to whom he gave his daughter in marriage. But once the Turks had set up a base on European soil and had seen the possibilities of further conquest, such relationships were no longer practicable. Stefan Dušan, who very nearly realized his ambition to found a new Serbo-Byzantine empire, was the only man who might have prevented the subsequent rapid expansion of the Turks into the Balkans, but he died in 1355 and his empire split up. The new emperor, John V, hoped that the Western world would sense the danger, and in 1355 he addressed an appeal for help to the Pope. The popes were concerned for the fate of the Christian East but guarded in their offers to Constantinople so long as the Byzantine Church remained in schism from Rome. In 1366 John V visited Hungary to beg for help, but in vain. In the same year his cousin Amadeo, count of Savoy, brought a small force to Constantinople and recaptured Gallipoli from the Turks, who had by then advanced far into Thrace. Amadeo persuaded the Emperor to go to Rome and make his personal submission to the Holy See in 1369. On his way home, John was detained at Venice as an insolvent debtor; during his absence the Turks scored their first victory over the successors of Stefan Dušan on the Marica River near Adrianople in 1371. The whole of Macedonia was open to them. The remaining Serbian princes and the ruler of Bulgaria became their vassals, and in 1373 the Emperor was forced to do the same.