Wellington

City · 1839 CE · in Oceania

Capital of New Zealand (1948–today).

Pietermaritzburg (1839 CE): Capital of Natalia Republic (1840–1843).
Al Bayda (1840 CE): Capital of Kingdom of Libya (1953–1968).
Windhoek (1840 CE): Capital of Namibia (1990–today).
Coburg (c. 1836 CE): Capital of Saxe-Coburg and Gotha (1836–1839).
Houston (1836 CE): Capital of Republic of Texas (1837–1839).
Tacna (c. 1836 CE): Capital of Peru-Bolivian Confederation (1836–1839).
Gotha (c. 1836 CE): Capital of Saxe-Coburg and Gotha (1836–1839).
Piratini (c. 1836 CE): Capital of Riograndense Republic (1836–1845).
Caçapava do Sul (c. 1836 CE): Capital of Riograndense Republic (1836–1845).
Ha'il (c. 1836 CE): Capital of Emirate of Jabal Shammar (1836–1921).

Around the same time and place

Treaty of Waitangi (1840 CE): Treaty signed on 6 February 1840 by representatives of the British Crown and Maori chiefs, the founding document of New Zealand; its English and Maori texts differ significantly.
Musket Wars (c. 1807–1837 CE): Series of intertribal Maori battles transformed by the arrival of European muskets, which killed many thousands and reshaped tribal territories.
New Zealand Wars (1845–1872 CE): Conflicts between the colonial government and various Maori groups, largely over land, which led to extensive confiscation of Maori land.
Invasion of the Chatham Islands (1835 CE): Two Maori iwi, Ngati Mutunga and Ngati Tama, invaded the Chatham Islands in 1835, killing and enslaving many of the pacifist Moriori.