Co Loa Citadel

City · c. 256 BCE – c. 965 CE · in East Asia

Capital of Âu Lac (256 BCE–207 BCE), Ngô Dynasty (947–965).

Balkh (c. 247 BCE): Capital of Greco-Bactrian Kingdom (247 BCE–127 BCE), Sasanian Empire (215–643), Indo-Sasanian Empire (260–357).
Ctesiphon (c. 239 BCE – c. 637 CE): Capital of Parthian Empire (239 BCE–224).
Nisa (c. 239 BCE – c. 224 CE): Capital of Parthian Empire (239 BCE–224).
Caesarea of Cappadocia (c. 239 BCE – c. 17 CE): Capital of Kingdom of Cappadocia (239 BCE–17).
Hecatompylos (c. 239 BCE – c. 224 CE): Capital of Parthian Empire (239 BCE–224).
Aigio (c. 279 BCE): Capital of Achaean League (279 BCE–146 BCE).
Amasya (c. 281 BCE): Capital of Kingdom of Pontus (281 BCE–183 BCE).
Xianyang (c. 218–206 BCE): Capital of Qin Dynasty (218 BCE–209 BCE), Zhai (208 BCE–206 BCE).
Cherchell (c. 212 BCE): Capital of Mauretania (212 BCE–42).
Kutaisi (301 BCE): Capital of Colchis (301 BCE–231 BCE), Kingdom of Georgia (1010–1122), Kingdom of Imereti (1468–1810).

Around the same time and place

Qin Shi Huang (259 BCE – 210 BCE): King of Qin who conquered the other Warring States and in 221 BCE became the first emperor of a unified China, standardising script, coinage and measures.
Qin unifies China (221 BCE): With the fall of Qi, the state of Qin completed the conquest of the Warring States and founded the first unified Chinese empire.
Han dynasty (202 BCE – 220 CE): Liu Bang founded the Han dynasty, a formative imperial age whose name became that of the majority Chinese ethnic group.
Movable type (Bi Sheng) (c. 1040 CE): The artisan Bi Sheng invented movable type made of fired clay, as described by Shen Kuo.
Angkor Wat (c. 1120 CE): Temple complex built in the first half of the 12th century under Suryavarman II, originally dedicated to Vishnu; the largest religious monument in the world.
Zhou dynasty (1,046–256 BCE): The longest-lasting Chinese dynasty, whose rulers claimed the Mandate of Heaven; real power declined after the move east in 771 BCE.
Emperor Wu of Han (156 BCE – 87 BCE): Han emperor whose 54-year reign saw wars against the Xiongnu, expansion into Central Asia, Korea and Vietnam, and state sponsorship of Confucianism.
Battle of Red Cliffs (208 CE): Allied forces of Sun Quan and Liu Bei defeated Cao Cao's fleet on the Yangtze, preventing his conquest of the south.