The 20 Greatest Empires in History

The Achaemenids established a model of imperial administration that did not require all provinces to be alike—a concept that was quite progressive for the ancient world. Under rulers such as Cyrus and Darius, Persia united a vast and diverse kingdom through a network of roads, regional governance, and an imperial system that could actually function on a day-to-day basis. The importance of this model for later empires—even when they were officially “rivals”—cannot be overstated.

Alexander’s empire did not last long as a single entity, but its historical impact far exceeded its size. By overthrowing the Persian Empire and advancing into parts of India, he set in motion the spread of the Greek language and culture across a vast region, thereby creating the Hellenistic world that followed. Even after his death, the kingdoms that emerged preserved this cultural blend for centuries.

Rome is the classic example of an empire that did not merely conquer, but also organized: law, roads, cities, and a shared political identity all played an important role. Officially founded in 27 B.C., it dominated the Mediterranean world and left a legacy that is still evident today in legal systems, languages, and architecture. Even when the western half collapsed, the eastern half endured in a new form rather than disappearing overnight.

The Byzantine Empire was the continuation of the Roman Empire—more specifically, its eastern half—which survived for about a thousand years after the split with the West. Centered on Constantinople, it preserved and adapted Roman governance while serving as a major bridge between Europe and Asia through trade and diplomacy. It lasted from 395 A.D. until its fall in 1453.

The Umayyads were the first major Muslim dynasty to rule the caliphate, and their rapid expansion helped transform Islam from a regional movement into a major global civilization. With Damascus as their capital, they presided over an empire that spread across a vast territory in a surprisingly short time. They also left a visible architectural legacy, which partly explains why this period still feels so tangible today.

The Abbasids replaced the Umayyads in 750 AD and moved the capital to Baghdad, which became a major commercial center. This era is closely associated with scholarship, translation, and cultural exchange, which is why people often associate the Abbasids with a “golden age” of Islamic civilization. Even as political control fragmented over time, the cultural influence of the caliphate did not simply disappear.

The Ottomans were not only powerful; they were resilient, having endured for more than six centuries and ruling over parts of Europe, the Middle East, and North Africa. In the 15th and 16th centuries, they became one of the most formidable states in the world, and their government successfully managed a striking mix of languages, religions, and local customs. The empire’s final collapse after World War I brought an end to a long chapter in the regional order and redrew borders in a way whose effects we still feel today.

When you think of the “largest contiguous empire on earth,” you think of the Mongols at their peak. Founded by Genghis Khan in 1206, it stretched from East Asia to Europe and the Middle East, bridging vast distances through conquest and administration. Of course, it wasn’t all peace and trade, but its connectivity reshaped Eurasian trade in a way that few empires have ever matched.

The Maurya Empire is one of the best examples of the first large-scale states in South Asia, particularly under Ashoka. After adopting a policy centered on dharma, Ashoka promoted governance focused on public works and social welfare, and he also played a major role in supporting the spread of Buddhism.

The Mughal Empire shaped northern India through its administration, wealth, and cultural influence—not just through its territory. Its reign, from the early 16th century to the 18th century, gave rise to a large-scale, centralized, and efficient imperial system, particularly during its period of greatest power. And yes, it also left behind some of the world’s most famous architectural wonders, such as the Taj Mahal.

The Han dynasty helped define what “Imperial China” would look like, which is a rather significant legacy to claim. In power from 206 B.C. to 220 A.D., they built upon earlier administrative structures and transformed them into a lasting imperial model. Even the name “Han” later became associated with Chinese identity itself, demonstrating just how profound their influence was.

While the Han dynasty helped shape the structure, the Tang dynasty helped shape cultural flourishing. From 618 to 907 CE, Tang China is often described as a golden age, marked by major achievements in governance, art, and international trade. Its capital, Chang’an (now Xi’an), became a true global metropolis for its time—the kind of detail that makes history feel surprisingly modern.

The Qing were China’s last imperial dynasty, ruling from 1644 to about 1912, and they oversaw significant territorial expansion and population growth over the centuries. The empire grew spectacularly and incorporated a wide variety of peoples into a single imperial system.

At its peak, the British Empire became the largest empire in history, spanning colonies and territories across several continents. It was not just about land, but also a system of trade, administration, and influence that shaped global politics and economics for centuries. The consequences—for better or for worse—are still evident in the languages, borders, and institutions around the world.

The Spanish Empire was one of the first truly global empires, linking the Americas, Africa, Europe, Asia, and beyond through exploration and conquest. It transformed the Atlantic world through colonization, the flow of resources, and large-scale cultural changes. Even after its heyday, its linguistic and cultural influence remained enormous, particularly in the Americas.

Portugal built an empire that relied less on a contiguous territory than on strategic coastal hubs, sea routes, and trade networks. It emerged very early on, in 1415, grew through maritime exploration, and lasted remarkably long, until the end of the 20th century.

France’s imperial history is complex, in part because it has experienced ups and downs at various times rather than following a steady trajectory. Nevertheless, France built a major overseas empire that shaped the language, education, and political structures across much of Africa, the Caribbean, and Asia. Its legacy is particularly evident in the way French culture and institutions have taken root far beyond Europe.

The Russian Empire was officially established in 1721, when Peter I was granted the title of emperor, and grew to become a vast, multi-ethnic state. Administering such a vast territory meant governing over enormous distances, a wide variety of peoples, and vastly different regions under a single imperial authority. Its collapse in 1917 did not erase its influence, as it shaped the region’s subsequent political trajectory.

The Incas ruled a powerful Andean empire along the Pacific coast and the highlands, stretching from regions of modern-day Ecuador to central Chile. What is striking is just how much they accomplished in terms of infrastructure and organization in such challenging terrain, connecting regions through roads and state systems that supported imperial control. The Spanish conquest in the 1530s brought an end to their political dominance, but the legacy of Inca society remains deeply rooted in the Andes.

The Aztecs built a major empire in what is now central and southern Mexico, anchored by the extraordinary city of Tenochtitlan. Their political power, tribute networks, and cultural influence enabled them to dominate the region until the Spanish conquest in 1521. Even today, the history of the Aztecs is inextricably linked to that of Mexico, as their legacy did not disappear with the fall of the empire.