Late Antiquity

The mosaic is a formal, frontal composition carved in tiny glass and stone tesserae, set into the wall of the church of San Vitale in Ravenna, a city that served as the western capital of the Byzantine Empire. It dates to 547 CE, a moment when the emperor Justinian had recently reconquered much of the western Mediterranean, including Italy, from the Ostrogoths. The scene is not a narrative action but a ceremonial tableau: Justinian stands at the exact centre, flanked by two groups that together form a single, ordered procession moving toward the viewer’s left.

On the emperor’s right (the viewer’s left) are clergy, led by Bishop Maximianus, whose name appears in the mosaic’s own inscription — a rare and deliberate act of self-identification. Maximianus carries a cross, and he is the only figure besides Justinian whose name is recorded, signalling his political and ecclesiastical importance in Ravenna. On the emperor’s left are officials and soldiers, bearing a shield and other insignia of imperial authority. Justinian himself holds a paten, the shallow dish used in the Christian Eucharist, and wears a jewelled crown and a purple cloak — the colour reserved for the emperor alone. His halo, a golden disc behind his head, marks him not merely as a ruler but as a sacred figure, an image of Christ’s authority on earth.

The composition teaches a central idea of the early Byzantine state: the fusion of imperial and religious power. Justinian is shown as the head of both the secular administration and the Church, standing at the meeting point of clergy and army, court and altar. The mosaic does not depict a historical event — no specific ceremony is recorded — but rather an eternal statement of hierarchy. Every figure is shown frontally, with identical height and solemn expression, so that no individual personality intrudes; they are types, not portraits. The gold background, typical of Byzantine art, removes the scene from any earthly setting and places it in a timeless, heavenly space. …

The figure shows the Colosseum at Rome, the great amphitheatre completed in 79 CE. It is presented as a cutaway or cross-section so you can see both the exterior tiers and the interior arena where the action happened. The caption tells you exactly what mattered to the Romans who built it: gladiators fought wild beasts there, and the whole thing was designed to hold a crowd of 60,000 people.

What the image teaches is scale and purpose. The Colosseum was not a temple or a public hall — it was a purpose-built arena for spectator blood sports, and its size tells you how central those games were to Roman urban life. Sixty thousand spectators is roughly the population of a decent-sized city in the ancient world, all packed into one building to watch combat. That number alone signals how much the emperors invested in public entertainment as a tool of control: keep the masses fed and amused, and they will not rebel.

The layout you see in the figure reflects that function. The outer walls rose in several storeys, each with arched openings, and inside, the seating sloped down in tiers toward the oval arena floor. Below the arena surface ran a network of chambers and passages — the hypogeum — where animals and gladiators were held before being hoisted up through trapdoors. The figure typically shows these underground levels cut open, so you can grasp that the spectacle was engineered from below, not just staged on the sand. …

The figure shows a single, massive object: the marble head of the emperor Constantine, carved around 313 CE. It is not a complete statue but a fragment — the head alone, oversized and set apart from the body it once belonged to. The face is turned slightly upward, with a fixed, staring gaze that does not look at the viewer but past them, toward something distant. That upward tilt is deliberate; it gives the emperor a visionary, almost otherworldly quality, as if he is in direct communion with a higher power rather than with the people below.

What the image does not show is just as important as what it does. The head is part of a colossal enthroned statue, and the scale of that original work is the real subject of the figure. The head alone is enormous, which means the full statue would have towered over anyone who approached it. The caption tells us the date — 313 CE — which places it in the same year as the Edict of Milan, when Constantine legalised Christianity in the Roman Empire. The statue was not merely a portrait; it was a piece of imperial propaganda carved in stone. …