John Tzimisces was famous as a gallant defender of the empire. The people of Constantinople knew him chiefly for the imposing ceremonies of his accession, of his second marriage with Theodora, daughter of Constantine VII., and of his departure for war against the barbarian invaders, when the clergy led him in pomp to his embarkation on the Golden Horn, and blessed his ships, and the citizens watched a naval sham fight from the walls. Domestic rebellions—those of Bardas, Sclerus, and of the family of Phocas—as well as the dangerous Russian invasions—distracted his reign: but Tzimisces was a successful general, and by his conquest over the Russians under Swiatoslaf he preserved the Empire, and began that association of teaching and Christian influence which is returned to-day by the orthodox Russians to the Church of Constantinople, which is their mother, and which now, in her time-honoured conservatism, weak though she is, she is inclined rather to resent than to welcome. From his conquest John Tzimisces returned in triumph to Constantinople through the Golden gate, followed by his soldiers and his captives, greeted by the Church and by the officers of his court, and watched by the vast population of the imperial city. It was one of the greatest of the triumphs, as it was one of the last. The ancient usages were retained in all their pomp. The senate met the Emperor at the gate with the conqueror's chaplet and with the golden chariot drawn by four white horses, in which they besought him to drive through the streets. Dramatically he showed his sympathy with the religious feeling of his people; the chariot should carry the Ikon of the Blessed Virgin which he had taken in Bulgaria and to which he attributed his victories: he would ride behind, clothed as an emperor and a general, and would offer in S. Sophia the crown of the conquered Bulgarian kings. Then in the palace the young Bulgarian chieftain Boris, who had followed his triumph on foot, was despoiled of the insignia of sovereignty, yet ranked among the officers of the imperial court.

It was not the last of the victories of John Tzimisces. He returned more than once a conqueror from Armenia and Mesopotamia. He died in 976, in the midst of his victories; and since the young Emperors whom he had guarded were now grown to man's estate, men spoke of his death as mysterious and as probably due to poison.

In Basil II. the Empire again had a warrior Emperor, but one who added to the delights of war the devotion of an almost monastic religion. While his brother, Constantine IX., confined himself to the court and its pleasures, Basil in many hard-won fights achieved the title of Bulgaroktonos, the slayer of the Bulgarians. For thirty-four years he fought the great King Samuel, who had built up a power in the Balkans, till at last he utterly broke up the Slavs, captured all their fortresses, and extended the frontier of the Empire to Belgrade, and so down the Danube to the Black Sea. It was, as Gibbon says, "since the time of Belisarius, the most important triumph of the Roman arms." Victories also he won in the East, but they served only to break down the kingdom of Armenia, and thus to destroy what might have been a bulwark against the infidel. Basil, who reigned from 963 to 1025, when he died at the age of sixty-eight, and who for more than fifty years was practically the sole ruler of the Empire, was a stern, vigorous man, sharp in speech, often cruel in victory, serious and restrained in life, but fond of mirth in his moments of ease. He was a complete contrast to his idle brother, who lived it seemed only for the Hippodrome and the society of the ladies of his court. Basil was never married. Constantine, who survived him three years, left three daughters.[20] During his long reign Basil had swept away all rivals from his path: the great chamberlain Basil had early been banished, and there was no dynasty to compete with the Macedonians in the last days of their power.

Basil taught the people that the Emperor could rule without the intervention of courtiers, and thus when he died the imperial city looked for a man to be at its head. If they had feared rather than loved the great conqueror of the Bulgarians, they respected him because he had kept up the power of the Church and had patronised the learning which still had its home in the East. He left to his successors the alliance of the patriarchal See and a school of literature founded on classic models, which, with all its affectations, gave to the eleventh century an important group of historical writers. In no age, too, was Byzantine art, the art of working in ivory, of miniature, of mosaic, more vigorous. With the death of Basil, however long it might be disguised, the decay began.

When Constantine died his three daughters survived him, Eudocia who preferred a convent to a throne, and Zoe and Theodora, ladies of more ambitious temper. Zoe before her father died was wedded—she was forty-eight—to Romanus Argyrus, an elderly noble already married, whose wife was banished to a convent. Romanus III. was for six years (1028-1034) the nominal ruler of the Empire. He thought himself a philosopher and a warrior; but, says Psellus, "he thought he knew far more than he did." Some of his acts were useful—as his repair of the walls after the earthquakes of 1032 and 1033, commemorated by an inscription on the fourth tower from the Sea of Marmora, shows. But the historian mocks at his long drawn-out building of the monastery of S. Mary Peribleptos and says that a "whole mountain was excavated" to supply the stones. It was his most enduring memorial, and, several times rebuilt, it still survives in the possession of the Armenians as the monastery of S. George, not far from the Psamatia station.

But the Emperor's dreams of war, philosophy and building, were rudely disturbed by the intrigue of his wife with a young Paphlagonian soldier, Michael. He professed to disbelieve it, though it was notorious to the court. His complaisance perhaps allowed him to die in peace, though some said he was killed by a slow poison. On the very day of his death Zoe elevated Michael to the throne, and before the burial of Romanus the senate kissed the right hand of his successor.

Michael appears before us in the pages of the rhetorical Psellus as almost a hero and a saint. He reclaimed sinners after the manner of Justinian, he reformed the administration, he daily worshipped God in the services of the Church, and nightly walked the streets to watch and to prevent crime. One of the strangest pictures of mediæval Constantinople is that which Psellus gives us of the unwearied Emperor, disguised in monkish dress, passing swiftly "like lightning" through the streets at night, watching that his people might be preserved from crime. Yet with all his virtues he was a drunkard, and the epileptic fits to which he became more and more subject were probably due to his vices. So terribly did his affliction increase upon him that when he gave audience it was necessary to surround him with curtains which could in a moment be drawn to hide his paroxysms, and when he rode his guards formed a circle about him. His greedy relations surrounded him and urged him to provide for them, and when he had signalised his reign by a heroic defence of the Empire against a rising of the Bulgarians he returned in triumph only to retire to a monastery and to die.

Zoe emerged from the seclusion in which she had passed the last years of her young husband's life, and was induced by her family to make his nephew, Michael Kalaphates Emperor. Raised to the throne by his family he set himself at once to reduce it to the lowest depths. "The names of kinship, the common tie of kindred blood, appeared to him mere childishness, and it would have been nothing to him if one wave had engulfed all his kin." The same measure he meted to the nobles and the officials; but he courted popularity with the traders and the populace more than any of his predecessors had done, and when he showed himself in the streets silk carpets were strewn before him and he was greeted as the noblest of the Cæsars. Yet he relied too much upon the fickle mob. When the senate consented to his banishment of Zoe, shorn as a nun, to Prince's Island, he proclaimed his act in the forum of Constantine for the acceptance of the people.

But Constantinople again showed that, favoured as it had been like a petted child, it could show its power. The people assembled in knots at street corners and protested against the banishment of the heiress of the Macedonian warrior. The conclaves became a riot and the riot a revolution. Women ran through the streets tearing their hair and beating their breasts. Officers of State joined the mob, and they rushed to destroy the houses of the Emperor's family. Zoe was hastily recalled from Prinkipo, and shown in purple robes to the people in the Hippodrome. But it was too late. The mob broke open the monastery of the Petrion (by the Phanar) where her sister Theodora had long lived in retirement, and forced her to go with them to S. Sophia and there the patriarch Alexius and the vast crowd hailed her as Empress. The Emperor and his uncle took refuge in the church of the Studium. They were dragged from the altar and their eyes were put out; and Zoe and Theodora, who hated each other, became joint Empresses.

Their rule was extravagant and reckless; and while the State was advancing rapidly towards bankruptcy, the aged Zoe took a third husband, after two attempts at choice, wedding Constantine Monomachus, who reigned from 1042 to 1054 as Constantine X. The old Empress and her young husband gave themselves entirely to pleasure, to luxury and buffoonery. The Emperor, generous in giving and knowing how to confer benefits after the manner of an Emperor, beautified the city by the building of the magnificent monastery of S. George at the Mangana (near Deirmen Kapou on the Mamora), and amused the citizens by showing them an elephant and a camelopard. The court which Constantine and Zoe gathered round them was a strange assembly; its chief personage was the Emperor's mistress Skleraina, whom the Empress treated as a friend. The people resented the conjunction and cried "we will not have Skleraina to reign over us, nor on her account shall our purple-born mothers, Zoe and Theodora, die." The aged Zoe herself appeased them. It was an extraordinary state of society, reminding us of the eighteenth century in France: the intrigues that Psellus tells are indeed hardly credible. But the social corruption coexisted with a real revival of learning. Constantinople became the centre of a new study of literature, which had decayed since the iconoclastic emperors set themselves to destroy culture and Leo III. abolished the University. Constantine refounded the University, endowing two chairs—philosophy and law—which were held by Psellus and his friend, John Xiphilinos. A revival of the study of the classics followed this institution: Psellus considered himself a Platonist, and he thought himself worthy to represent as well as to revive the best traditions of Greek literature. In the hands of Anna Comnena and her contemporaries, the purism which the writers affected became little more than an Attic euphuism.