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The Song (aka Sung) dynasty ruled China from 960 to 1279 CE with the reign split into two periods: the Northern Song (960-1125 CE) and Southern Song (1125-1279 CE). The Northern Song ruled a largely united China from their capital at Kaifeng...

Thebes is a town in central Greece which has been continuously inhabited for five millennia. It was an important Mycenaean centre in the middle to late Bronze Age and was a powerful city-state in the Classical period, participating in both...

Gojoseon (Gochoson or Old Choson) was an ancient kingdom which ruled northern Korea in the second half of the first millennium BCE. Gojoseon possessed the most advanced culture in the Korean peninsula at that time and was an important marker...

The Jurchen Jin dynasty (meaning “Golden”) ruled parts of China, Mongolia, and northern Korea from 1115 to 1234 CE. The Jurchen originated from Manchuria, but in conquering the neighbouring Liao empire of the Khitan and parts of Song China...

Emperor Gaozu (also Kao-tsu, formerly Li Yuan, r. 618-626 CE) was a Sui military commander who led a rebellion against his former masters, seized control of the state, and founded the Tang Dynasty (618-906 CE). Overshadowed in the ancient...

A polis (plural: poleis) was the typical structure of a community in the ancient Greek world. A polis consisted of an urban centre, often fortified and with a sacred centre built on a natural acropolis or harbour, which controlled a surrounding...

The Qin Dynasty (221-206 BCE) was the first dynasty of Imperial China (defined as the era of centralized, dynastic government in China between 221 BCE and 1912 CE) which united the separate states following the Warring States Period (c. 481-221...

An empire is a political construct in which one state dominates over another state, or a series of states. At its heart, an empire is ruled by an emperor, even though many states in history without an emperor at their head are called "empires"...

The Crown Jewels of the monarchy of the United Kingdom of Great Britain and Northern Ireland are today kept in the Tower of London and date mostly to the 17th century, with a few later sparkling additions such as the Koh-i-Noor and Cullinan...

Urbanization is the process by which rural communities grow to form cities, or urban centers, and, by extension, the growth and expansion of those cities. Urbanization began in ancient Mesopotamia in the Uruk Period (4300-3100 BCE) for reasons...