In the reign of Emperor Trajan, the beginning of the second century, the Empire was as large as it would ever be.
The empire stretched from Hadrian's Wall in Northern England to the Euphrates in Syria.
Population estimate: 55-60 million (about one fourth of the world's estimated population at that point)
Religion: Polytheism
Today 50 different countries are encompassed in this territory.
The Kushan Empire during the reign of Kanishka.
Religions: Hinduism, Buddhism, Shamanism, Zoroastrianism, various Bactrian-Indian religions
Today, part of Afghanistan, China, Kyrgazstan, India, Nepal, Pakistan, Tajikistan, Uzbekistan, Turkmenistan
Current ruler: King of Kings, Euergetes, Dikaios, Epiphanes, Philhellen
Religions: Zoroastrianism, Babylonian Religion
Today Part of: Afghanistan, Armenia, Bahrain, Georgia, Iran, Iraq, Kuwait, Pakistan, Qatar, Saudi Arabia, Syria, Turkey, Turkmenistan, United Arab Emrates
Current Dynasty: Zhou
Religions and Philosophies: Buddhism, Taoism and Confucianism