Welcome to Rome: The City That Conquered the World

The year is 117 AD, and you stand at the edge of a bridge overlooking the Tiber River. The morning sun catches the bronze roof of the Temple of Venus and Roma, sending a golden shimmer across the water. Below you, the riverbanks are already bustling with activity—fishermen hauling their nets, laundry women beating clothes against the stones, and a group of slaves unloading amphorae from a flat-bottomed barge. The air smells of bread baking somewhere nearby, mixed with the ever-present tang of the sea that somehow reaches even this far inland. You take a deep breath and look up at the city before you. There, rising on seven hills, spreading across the lowlands, stretching to the horizon in every direction, is Rome—the capital of the greatest empire the world has ever known.

What you see before you is not just a city. It is a phenomenon, a miracle of human organization and ambition that would not be equaled for another thousand years. Rome in the second century AD is home to more than one million people, a population density that won't be matched in European cities until the nineteenth century. It is a metropolis where senators walk to the Forum in their togas, where emperors are worshipped as gods, where gladiators train in massive stone arenas, and where merchants from Britain to India come to trade their goods. It is noisy, crowded, chaotic, magnificent, and utterly unlike anything you have ever seen before.

As you make your way across the bridge and through the city gates, you quickly realize that navigating Rome is both an art and a challenge. The streets are not laid out in any logical pattern. They twist and turn, following the contours of the hills, branching without warning, dead-ending at ancient walls or opening suddenly into grand plazas. The main thoroughfares are paved with large stone slabs, worn smooth by centuries of cart wheels and sandaled feet, but many of the side streets are little more than packed dirt, ankle-deep in dust in dry weather and knee-deep in mud when it rains. And everywhere—on every street, in every square, at every corner—there are people.

You squeeze past a vendor selling hot sausages from a charcoal brazier, narrowly avoid a cart loaded with marble blocks being pulled by oxen, and duck under the arm of a lictor escorting a magistrate through the crowd. The lictor wears a distinctive white tunic with a purple border and carries a bundle of rods called fasces strapped to his shoulder—a symbol of the magistrate's authority. Citizens step aside to let him pass, pressing themselves against the walls of buildings or ducking into doorways. Even in this empire of millions, the rituals of power are still observed.

The Seven Hills: Where Rome Was Born

To understand Rome, you must first understand its hills. The city rises on a cluster of seven hills overlooking a bend in the Tiber River, and each hill has its own character, its own history, its own monuments. These hills were not just geographic features—they were the foundations of a civilization that would reshape the world.

The Palatine Hill, the central and most prestigious of the seven, is where tradition says Rome was founded. According to legend, the twins Romulus and Remus, raised by a she-wolf, founded the city here in 753 BC. Today, the Palatine is covered with the ruins of imperial palaces, where emperors like Augustus, Tiberius, and Domitian lived in splendor overlooking the city they ruled. From the Palatine, you can look down on the Circus Maximus to the south, where thousands gather for chariot races, and out toward the Colosseum to the east, that massive amphitheater where gladiators battle for glory and crowds roar for blood.

To the north of the Palatine sits the Esquiline, the largest of the hills and home to a curious mixture of residents. Here you'll find the grand houses of the wealthy on the slopes, but also the crowded tenements and cemeteries that clustered on the summit. The Esquiline was famous for its gardens—Emperor Nero's legendary Golden House, the Domus Aurea, once spread across much of this hill before being demolished and built over. Today, as you walk its streets, you might pass beneath the arch of Trajan's Market, that strange half-cylinder structure built into the hillside that served as a kind of ancient shopping mall.

West of the Esquiline, the Viminal and Quirinal hills rise in sequence, their slopes increasingly developed as Rome grew. Here you'll find more temples, more government buildings, more neighborhoods where ordinary Romans lived their daily lives. At the summit of the Quirinal, the Temple of Serapis and the Baths of Constantine provided relaxation for the elite, while the Viminal's most famous landmark was the Temple of Quirinus, where the god of the Roman people was worshipped.

The Capitoline Hill stands apart from the others, connected to them by ridges rather than rising from the same valley floor. This is the hill of gods and power, where the Temple of Jupiter Optimus Maximus—the greatest temple in Rome—dominated the skyline for centuries. Here, too, is the Tabularium, the archives of the Roman state, where records were kept that documented everything from treaties with foreign nations to the details of property ownership. The Capitoline was so sacred that the Romans never built houses here; it was reserved for the gods.

North of the Capitoline, the Caelian Hill was traditionally associated with military matters. Armies marched through here when they returned in triumph, and many famous generals had their homes on its slopes. The Temple of Claudius, begun by Emperor Agrippina and completed by her son Nero, was built here—a massive structure whose ruins can still be seen today.

Finally, there is the Aventine, the southernmost of the hills, a residential district known for its gardens and its views. Here lived many of Rome's wealthy families, including the poet Ovid and the famous orator Cicero, who both called the Aventine home. The hill also hosted important religious sites, including the Temple of Ceres and the Ara Maxima, the great altar of Hercules.

The geography of these seven hills shaped Rome in ways both practical and symbolic. The hills provided natural defense in the city's early years, when walls were necessary to protect against enemies. The valleys between the hills, called "subura," became crowded commercial districts, filled with workshops and markets. The Tiber River provided water, trade routes, and a border on the west. And the hills themselves, with their commanding views, became the sites of temples and palaces that expressed Roman power and piety.

The Tiber: Rome's River of Life

If the hills gave Rome its shape, the Tiber gave it life. This muddy, yellowish river flows for 252 miles from the Apennine Mountains to the Mediterranean, passing through the heart of Rome on its way to the sea. The Romans called it the Tiberinus, and they worshipped it as a god, offering sacrifices to ensure its continued blessing.

In the Rome of 117 AD, the Tiber is the city's main highway, its supermarket, and its sewage system all at once. Every day, hundreds of boats ply its waters, carrying goods from distant provinces to the city's hungry markets. Grain ships from Egypt, wine from Campania, olive oil from Spain, marble from Greece, spices from Arabia, silk from China—all flow down the Tiber to be unloaded at the docks along the riverbank.

The river's banks are lined with warehouses, docks, and the workshops of boat builders and rope makers. The district along the Tiber, called the Ripa, is always busy with the noise of commerce. Slaves and dockworkers haul crates and barrels from ships, while merchants haggle over prices in the open air. The smell here is strong—fish, wine, and the particular mustiness of goods stored too long in warehouses—but Romans have learned to live with it. This is where their food comes from, their wealth flows, their empire breathes.

Not everything that reaches the Tib