An Empire Across Three Continents | Class 11 History
This is a complete set of study notes on An Empire Across Three Continents from the Class 11 CBSE History textbook Themes in World History. The chapter looks at one of the greatest empires the world has known: the Roman Empire, which at its height stretched across Europe, Africa and Asia. Here we cover its geography, its politics, its society and economy, and the neighbouring Sasanian empire of Iran. These notes are part of our Class 11 History notes collection, and you can pair them with the wider Learnacy Hub to see how this ancient story links to the world today.
The Roman and Iranian Empires
For most of their history the Romans and the Iranians were bitter rivals who fought each other again and again. Their two empires were separated only by a narrow strip of land running parallel to the river Euphrates.
- The Mediterranean Sea sat at the heart of the Roman world, stretching from Spain in the west to Syria in the east. Rome dominated the sea completely, both to its north and to its south.
- To the north, the rivers Rhine and Danube formed the frontier, while the Sahara desert marked the southern edge. This was the reach of the Roman Empire.
- Iran controlled the region around the Caspian Sea and part of Afghanistan. The Chinese called this far western world Ta Ch'in, meaning roughly 'greater China' or 'the west'. It was divided between these two superpowers.
What sources help us understand Roman history?
The evidence used by Roman historians falls broadly into three groups:
- Texts
- Documents
- Material remains
Textual sources
Textual sources include histories written by people of the time (often called 'annals', because the story was told year by year), as well as letters, speeches and sermons.
The most common documentary sources are inscriptions and papyri. Because inscriptions were usually carved on stone, a large number have survived in both Greek and Latin.
What is papyrus?
The papyrus was a reed like plant that grew along the banks of the Nile in Egypt. It was processed into a widely used writing material. Thousands of contracts, accounts, letters and official documents have survived on papyrus, and scholars who study them are called papyrologists.
Material remains
Archaeologists have uncovered buildings, monuments and other structures, as well as pottery, coins, mosaics and even whole landscapes, sometimes revealed through aerial photography.
The Roman Empire
Augustus: the first emperor
The Roman Empire was a patchwork of territories and cultures held together mainly by a shared political system.
- Augustus, the first Roman emperor, came to power in 27 BCE.
- His rule is known as the 'principate'. Augustus presented himself not as an all powerful king but as the 'first citizen' (princeps).
- In theory he was simply a leading citizen, not the outright ruler of the state.
The Roman Empire began with the end of the Roman Republic. Under the Republic, a body called the Senate had held control.
Which languages were used across the empire?
The empire was administered in several languages, but Latin and Greek were the two most widely used.
- The upper classes of the east spoke and wrote in Greek, while those of the west used Latin. The dividing line ran through the Mediterranean, between the African provinces of Tripolitania (Latin speaking) and Cyrenaica (Greek speaking).
- Wherever they lived and whatever language they spoke, everyone in the empire was a subject of a single ruler, the emperor.
What was the Senate?
For centuries the Senate remained a body that represented the aristocracy, that is, the wealthiest families of Roman and, later, Italian origin, who were mainly landowners.
- Senators wrote most of the Roman histories that survive in Greek and Latin. As a result, emperors were often judged by how they treated the Senate.
- The 'worst' emperors, in these accounts, were those who were hostile to the senatorial class and behaved with suspicion, brutality or violence. Many senators wished to bring back the glory days of the Republic, though they must have known this was no longer possible.
The army
- The army was the other great institution of imperial rule. Unlike its Persian rival, Rome had a paid professional army, and soldiers had to serve for at least 25 years.
- A paid, standing army set the Roman Empire apart.
- The army was the largest single organised body in the empire (about 600,000 by the fourth century), and it had the power to decide the fate of emperors. Soldiers constantly demanded better pay and conditions, which often broke out into mutinies.
- Once again, our picture of the army is shaped heavily by historians with senatorial sympathies.
The Senate feared and disliked the army as a source of unpredictable violence, especially during the tense conditions of the third century, when the government was forced to raise taxes to meet rising military costs.
Political Succession
What do we know about the political history of the empire?
There were three main players in the political history of the empire:
- The emperor
- The aristocracy
- The army
An emperor's success depended on his control of the army, and when the armies were divided, civil war followed. Apart from one year (69 CE), when four emperors came to the throne in quick succession, the first two centuries were relatively peaceful and stable.
The throne usually passed down through the family, by birth or by adoption, and even the army respected this principle.
How did succession work after Augustus?
Tiberius (14 to 37 CE) was not Augustus' biological son. He was adopted to make the handover of power smoother after Augustus' death. Tiberius inherited an empire that was already so vast that further expansion seemed unnecessary.
The age of Augustus brought peace after decades of internal conflict and centuries of military conquest.
Dependent kingdoms
In 113 to 117 CE, the successors of Trajan gave up his costly occupation of territory beyond the Euphrates. To slowly widen the reach of direct Roman rule, a series of 'dependent' kingdoms were absorbed into Roman provincial territory.
By the early second century, the small states west of the Euphrates had disappeared, swallowed up by Rome.
Coinage: Herod's kingdom, for example, produced 5.4 million denarii a year, worth more than 125,000 kilogrammes of gold. The denarius was a Roman silver coin containing about four and a half grams of pure silver.
Taxation
Every province of the empire, except Italy, was taxed. In the second century the Roman Empire stretched from Scotland to the borders of Armenia, and from the Sahara to the Euphrates. Yet Rome had no modern civil service to run this huge territory.
The real pillars of the imperial system were the great Mediterranean cities, such as Carthage, Alexandria and Antioch.
The government had the power to tax the provinces, and this produced most of the empire's wealth. Local upper classes actively helped the Roman state to administer and tax their own regions. This is one of the most striking features of Rome's political history.
The rise of a provincial elite
During the second and third centuries, provincial upper classes ruled the provinces and commanded the armies. With the backing of the emperors, they formed a new administrative and military elite that grew far more powerful than the old senatorial class.
The emperor Gallienus (253 to 268) barred senators from holding military command. He kept them out of the army so that they could not use it to seize control of the empire.
As citizenship spread beyond Italy during the late first, second and early third centuries, the army and the administration drew more and more of their members from the provinces. Senators of provincial origin did not become the majority until the third century.
Cities, villages and famine
A new elite grew up in the wealthier and more urbanised parts of the Mediterranean, such as southern Spain, Africa and the east. In the Roman world a city was a settlement with its own magistrates, council and 'territory' of surrounding villages.
Cities could not take over another city's territory, but villages often could be added to one. A village might be raised to the status of a city as a mark of imperial favour, or lose that status as a punishment. The advantage cities had over the countryside was that they were better able to prepare for food shortages and even famine.
Public baths
Public baths were a striking feature of Roman urban life. When one Iranian ruler tried to introduce them, he met opposition, because water was sacred to the Iranians and bathing in public seemed almost sacrilegious.
Town dwellers had far more chances for leisure than country people. On one calendar, spectacula (public shows) filled as many as 176 days of the year.
The Sasanians
The last imperial Persian dynasty
The Sasanian or Iranian Empire was the last great Persian dynasty before the Muslim conquest in the mid seventh century. The Sasanians first appeared in Iran around 225, and by the 230s their empire was fighting on several fronts at once. They built the most aggressive dynasty of their age.
The Sasanian advance towards the Euphrates was rapid. In a famous rock inscription cut in three languages, the Iranian ruler Shapur I claimed to have destroyed a Roman army of 60,000 and captured Antioch, the eastern capital.
Between 233 and 280, a line of provinces stretching from the Black Sea to the Alps and southern Germany was invaded again and again. The Romans had to give up much of their territory east of the Danube, and their emperors were constantly at war against barbarian groups. The rapid turnover of rulers, 25 emperors in 47 years, shows how much strain the empire was under.
Gender, Literacy and Culture
Roman families and the dowry system
One of the most striking features of Roman society was the nuclear family. Adult sons usually did not live with their parents, and it was very unusual for adult brothers to share a single household.
- In the late Roman Republic the common form of marriage was one where the wife did not pass into her husband's authority but kept full rights in her father's property.
- The woman's dowry went to the husband for the length of the marriage, but she remained a main heir of her father and became an independent property owner on his death. So Roman women had real legal rights to own and manage property.
- In law, husband and wife were two separate financial persons, and the wife had complete legal independence. Divorce was simple and needed only a written notice from either partner.
- Men usually married in their late twenties or early thirties, while women married in their late teens or early twenties, so there was a clear age gap between husband and wife.
- Marriages were generally arranged, and women were often dominated by their husbands.
Domestic violence was common enough. Augustine, the great Catholic bishop who spent most of his life in North Africa, wrote that his father beat his mother regularly, and that most of the other wives in his small town carried similar bruises.
How did literacy vary across the empire?
Rates of everyday literacy clearly varied a great deal across the empire.
- Pompeii, buried by the eruption of Vesuvius in 79 CE, shows widespread informal literacy. Advertisements were painted on the walls of the main street, and graffiti was scrawled all over the town.
- In Egypt, where hundreds of papyri survive, professional scribes wrote most formal documents such as contracts, and they often note that a particular person cannot read or write. Even so, some groups, such as soldiers, army officers and estate managers, had higher rates of literacy.
Cultural diversity
The cultural diversity of the empire showed itself in many ways and on many levels:
- a huge variety of religious cults and local gods
- the many languages that were spoken
- the different styles of dress and costume
- the different foods that were eaten
- the varied patterns of settlement
Oral and written languages
Coptic was spoken in Egypt, Punic and Berber in North Africa, and Celtic in Spain and the north west. Until scripts were developed, though, many of these cultures were purely oral.
Armenian, for example, was not written down until the fifth century, while a Coptic translation of the Bible appeared in the third. The spread of Latin displaced the written forms of many languages, including Celtic, whose written form died out after the first century.
Economic Expansion
Trade
- Across the empire there were harbours, mines and quarries, brickyards and olive oil factories. Wheat, wine and olive oil were traded and consumed on a huge scale, and farmers everywhere tried to grow these crops in the best possible conditions.
- Wine and olive oil were carried in large jars called amphorae.
- Archaeologists have been able to work out the exact shapes of these containers, what they held and where they were made.
The Spanish olive oil industry
The Spanish olive oil industry reached its peak between 140 and 160. Most Spanish olive oil was shipped in a container known as Dressel 20, named after the archaeologist who first identified its form.
- Wherever Dressel 20 jars are found around the Mediterranean, Spanish olive oil went too. Spanish producers managed to capture the Italian olive oil market, which was only possible because they supplied cheaper, better quality oil.
- Large landowners competed hard for control of the main markets for their products.
- For most of the third and fourth centuries, North African producers took the lead, following in the footsteps of the Spanish.
The rise of other industries
- The Aegean, southern Asia Minor (modern Turkey), Syria and Palestine became major exporters of wine and olive oil, while African containers on Mediterranean markets fell away sharply.
- The prosperity of each region depended on how efficiently it could produce and transport particular goods, and on the quality of those goods.
Roman land
- The empire had a great deal of fertile land. Strabo and Pliny named Campania in Italy, Sicily, the region around Byzacium in Tunisia, southern Gaul (Gallia Narbonensis) and Baetica in Spain among the most densely settled or wealthiest regions.
- Campania produced some of the finest wines. Sicily and Byzacium supplied large amounts of wheat to Rome. Josephus wrote that 'the inhabitants cultivated every inch of the soil', and Spanish olive oil came mainly from along the river Guadalquivir in southern Spain.
Why did large parts of Roman territory stay undeveloped?
Transhumance, a form of pastoralism, was common in the countryside of Numidia (modern Algeria). These semi nomadic, pastoral communities carried their oven shaped huts, called mapalia, with them.
As Roman estates spread across North Africa, pastures were used up and it became harder for these communities to move about. Northern Spain was also less developed, with a Celtic speaking peasantry living in hilltop villages called castella.
Yet there are strong signs that the Roman economy has often been underrated: the use of hydraulic mining in the gold and silver mines of Spain, the vast industrial scale on which these mines worked in the first and second centuries (output not matched again until the nineteenth century), well organised commercial and banking networks, and the widespread use of money. This picture also raises important questions about labour and slavery.
Controlling Workers
What were conditions like for slaves?
Slavery was a long standing part of the ancient world, and it was never seriously challenged, even by Christianity in the fourth century. At the same time, slave labour did not dominate Roman economic activity as a whole.
Roman writers advised owners not to keep too many slaves, partly because of the cost and difficulty of looking after them. In many households ordinary people treated their slaves more kindly than the upper classes did.
The supply of slaves
- After the first century the supply of slaves fell, forcing those who relied on slave labour to breed slaves or to turn to cheaper alternatives such as wage labour.
- Slave labour could be very expensive, since owners had to feed and care for slaves all year round, whether or not there was work to do.
- For this reason hired labour was sometimes cheaper than slave labour.
- Slaves were widely used as business managers, and masters often lent money to slaves and freedmen to run their enterprises.
Labour management
Roman writers on agriculture placed great stress on managing labour.
- Columella, a first century writer from southern Spain, argued that the cost of certain tools was offset by the time they saved.
- Employers assumed that both free and slave workers needed close supervision. Workers were sometimes organised into gangs or teams so that they could be watched more easily.
- Columella claimed that in teams of ten it was easier to see who was making an extra effort. This, he thought, was good labour management.
- Pliny the Elder, author of the famous Natural History, condemned the use of slave gangs, because such slaves were often chained together by the feet.
- Pliny also complained that supervision was too tight in the perfume workshops of Alexandria, where workers were sealed and searched, and had to change their clothes before leaving.
A law of 398 ordered that workers be branded so that they could be identified if they ran away or tried to hide. Many private employers set up their agreements as debt contracts in order to keep tight control over their workers, and poor families often fell into debt bondage simply to survive. Rural debt was even more common: during the Jewish revolt of 66 CE, the rebels destroyed the moneylenders' records to win popular support.
Social Hierarchies
How was Roman society structured?
The historian Tacitus described Roman society in several layers: the aristocrats, the equestrians, the respectable section of the common people, those attached to the great houses, the poorer townsfolk (the plebs sordida, fond of the circus and the theatre), and finally the slaves.
In the early third century about half of the Senate's roughly 1,000 members came from Italian families. By the early fourth century the first two groups, senators and equestrians, had merged into a single, enlarged aristocracy, with at least half of all these families being of African or eastern origin.
This 'late Roman' aristocracy was wealthy but weaker than the military elites, who were almost entirely non aristocratic. The 'middle' class now included officials and soldiers as well as prosperous merchants and farmers from the eastern provinces. The vast majority of people, the humiliores (literally the 'lower' sort), included workers in mines and workshops, migrant labourers on the grain and olive harvests, self employed craftsmen and a large mass of casual labour, especially in the big cities.
According to Olympiodorus, the leading families of Rome could earn as much as 4,000 pounds of gold a year from their estates, not counting the produce they used directly. When the Spanish silver mines were exhausted, the government ran short of silver, and under Constantine the monetary system came to be based on gold instead.
The Roman bureaucracy
The late Roman bureaucracy was wealthy, because officials were paid mostly in gold and invested it in land. There was, of course, a great deal of corruption, especially in the courts and in the supply of the army. The greed of provincial governors was notorious. Yet the government repeatedly stepped in to check these abuses.
One remarkable feature of the classical world was its tradition of 'criticism'. Roman rule was autocratic, but emperors could not simply do as they pleased, and the law actively protected civil rights. That is why, in the late fourth century, powerful bishops such as Ambrose could stand up to equally powerful emperors when those emperors oppressed the people.
Late Antiquity
Late antiquity is the name given to the final, fascinating phase in the long history of the Roman Empire, roughly the fourth to the seventh centuries. This was a time of deep cultural and economic change.
The emperor Constantine made Christianity a favoured religion, and in the seventh century Islam arose. Major changes to the structure of the state began with Diocletian (284 to 305). Faced with over expansion, Diocletian 'cut back' by giving up territory that was hard to defend. He strengthened the frontiers, reorganised provincial boundaries, separated civil from military functions, and gave more independence to military commanders (the duces).
Constantine introduced a new gold coin, the solidus, weighing about four and a half grams of pure gold, which would outlast the Roman Empire itself. Millions of these coins were minted and circulated. He also founded a second capital at Constantinople (modern Istanbul in Turkey), surrounded by sea on three sides.
Because the new capital needed its own senate, the ruling classes grew quickly in the fourth century. The archaeological record shows heavy investment in the countryside, including oil presses, glass factories, screw presses and water mills, along with a revival of long distance trade with the east, all of which fuelled economic growth.
The religious culture of the classical world had been polytheist. Thousands of temples, shrines and sanctuaries honoured Roman gods such as Jupiter, Juno, Minerva and Mars, alongside Greek and eastern deities. The other major religion of the empire was Judaism, which was itself very diverse in late antiquity.
Polytheism did not disappear overnight, especially in the western provinces. As powerful bishops came to lead the Church, religious leaders tried to bring their followers into line and to enforce a stricter set of beliefs and practices.
In the west, Germanic groups from the north, such as the Goths, Vandals and Lombards, conquered the major provinces and set up 'post Roman' kingdoms: the Visigoths in Spain (later destroyed by the Arabs between 711 and 720), the Franks in Gaul, and the Lombards in Italy. These kingdoms pointed the way towards the beginnings of a 'medieval' world.
In the east the empire remained united, and the reign of Justinian was a time of prosperity and imperial ambition. His reconquest of Italy from the Ostrogoths, however, devastated the country and opened the way to the Lombard invasion.
The Colosseum, opened around 80 CE, could hold about 60,000 spectators who came to watch gladiators fight wild beasts. In the early seventh century the Sasanians, who had ruled Iran since the third century, overran all the major eastern provinces, including Egypt. Byzantium, as the Roman Empire was now called, won these provinces back in the 620s, just before the final great blow from the south east. The spread of Islam from Arabia has been called one of the greatest political changes in ancient history.
By 642, only ten years after the death of the Prophet Muhammad, the Arabs had conquered large parts of both the Roman and the Sasanian empires. These conquests, which later reached Spain, Sind and Central Asia, began with the bringing together of the Arab tribes under the new Islamic state, first in Arabia and then in the Syrian desert and along the borders of Iraq.
Why it still matters
The Roman Empire is not just a chapter to memorise. It is still being dug up, argued over and even rebuilt, right now. Look at Pompeii, the town this chapter uses as proof of everyday Roman literacy. In February 2025 the Pompeii Archaeological Park unveiled a huge, almost life size wall painting, called a megalography, in a banquet room now named the House of Thiasus. Spread across three walls and dated to about 40 to 30 BCE, it shows a procession of the followers of Dionysus, the god of wine, complete with dancers, hunters and musicians. It is one of the most important finds in Pompeii in over a century, and Italy's culture minister said that in a hundred years' time people would still call the day historic.
This connects straight to the notes above. The chapter tells you the empire was full of 'religious cults and local deities' and that mystery cults were part of Roman life. That fresco is exactly one of those cults, painted on a real family's dining room wall two thousand years ago. Ancient history stops feeling like a list of dates when a single new discovery lets you see a Roman household's beliefs for the first time.
There is a live debate hidden here too. For over a century, archaeologists rushed to expose Pompeii as it looked at the exact moment Vesuvius erupted in 79 CE, often stripping away later layers. Newer excavations are instead saving the traces of people who returned to live in the ruins after the eruption, which is changing how historians tell the story. Even Rome's most famous building is being remade: an 18.5 million euro project is installing a new movable arena floor inside the Colosseum, the same 60,000 seat amphitheatre this chapter describes, so that visitors can once again stand where gladiators fought.
So when you study this empire, you are studying something still unfolding in real museums and real budgets today. To keep pulling those threads between the ancient world and the present, explore more in our study notes library and the wider Learnacy Hub.