Kannauj

City · c. 555 CE · in South Asia

Capital of Maukhari Dynasty (555–606), Harsha's Empire (612–655), Gurjara-Pratihara Dynasty (800–1036).

Sambor Prei Kuk (c. 555–706 CE): Capital of Chenla (555–706).
Suyab (c. 555–749 CE): Capital of Göktürk Khaganate (555–586), Türgesh (704–749).
Basavakalyan (c. 555 CE): Capital of Chalukya Dynasty (555–756).
Bamburgh (c. 555 CE): Capital of Kingdom of Bernicia (555–633).
Manyakheta (c. 555 CE): Capital of Chalukya Dynasty (555–756), Rashtrakuta Dynasty (755–982), Western Chalukya Empire (980–1187).
Kabul (c. 561 CE): Capital of Turk Shahis (561–874), Durrani Empire (1776–1823), Emirate of Afghanistan (1828–1925), and 3 more.
Toledo (c. 542 CE): Capital of Visigothic Kingdom (542–711), Taifa of Toledo (1010–1085).
Wroxeter (c. 540 CE): Capital of Kingdom of Powys (540–1160).
Talgarth (c. 540 CE): Capital of Kingdom of Brycheiniog (540–1045).
Winchester (c. 534 CE): Capital of Kingdom of Wessex (534–927), Kingdom of England (936–1100).

Around the same time and place

Gupta Empire (c. 320–550 CE): Empire founded by Chandragupta I around 320 CE whose period is often called a classical age of Indian art, literature, science and mathematics.
Aryabhata (c. 476 CE – 550 CE): Mathematician and astronomer of Kusumapura (Patna) who used a place-value system, approximated pi and proposed that the Earth rotates on its axis.
Buddhas of Bamiyan (c. 570 CE): Two monumental standing Buddhas carved into a cliff in the Bamiyan valley in the 6th and early 7th centuries.
Brahmagupta (c. 598 CE – 668 CE): Mathematician and astronomer from Bhillamala in Rajasthan who gave the first rules for arithmetic with zero and negative numbers.
Chaturanga (c. 600 CE): Board game from Gupta-era India, attested by the 7th century, that is the common ancestor of chess, shogi and xiangqi.
Ellora Caves (c. 600 CE): Complex of over 30 Buddhist, Hindu and Jain rock-cut temples in Maharashtra, carved roughly between 600 and 1000 CE.
Songtsen Gampo (c. 605 CE – 649 CE): King who unified Tibet, moved the capital to Lhasa and is credited with introducing Buddhism and writing.
Harsha (c. 590 CE – 647 CE): Emperor who ruled much of northern India from Kannauj; his court was described by the poet Bana and the Chinese pilgrim Xuanzang.