Malabo

City · 1827 CE · in North Africa

Capital of Guinea (1968–today), Equatorial Guinea (1969–today).

Nafplio (c. 1827 CE): Capital of First Hellenic Republic (1827–1832).
Kuching (1827 CE): Capital of Kingdom of Sarawak (1842–1946).
Abuja (1828 CE): Capital of Federal Republic of Nigeria (1991–today).
Dargo, Vedensky District (c. 1828 CE): Capital of Caucasian Imamate (1828–1858).
Bishkek (1825 CE): Capital of Kyrgyzstan (1992–today).
Brussels (c. 1830 CE): Capital of Kingdom of Belgium (1830–today).
Alegrete (1831 CE): Capital of Riograndense Republic (1836–1845).
Monrovia (1822 CE): Capital of Republic of Liberia (1848–today).
Meiningen (c. 1820 CE): Capital of Saxe-Meiningen (1820–1870).
Sankt Wendel (c. 1820 CE): Capital of Principality of Lichtenberg (1820–1827).

Around the same time and place

Kingdom of Kongo (c. 1390–1914 CE): Central African kingdom with its capital at Mbanza Kongo; after Portuguese contact in 1483 its rulers adopted Christianity, and it later became deeply entangled in the Atlantic slave trade.
Ashanti Empire (1701–1901 CE): Akan state founded by Osei Tutu with its capital at Kumasi, which grew wealthy on gold and trade and resisted British expansion in a series of wars.
Kingdom of Dahomey (c. 1600–1904 CE): Fon kingdom centred on Abomey in present-day Benin, known for its female soldiers and its role in the Atlantic slave trade; conquered by France in 1894.
Oyo Empire (c. 1600–1836 CE): Yoruba state that rose to dominate much of present-day western Nigeria and Benin from the 17th century using cavalry, before collapsing in the 1830s.
Sokoto Caliphate (1804–1903 CE): Islamic state founded after Usman dan Fodio's jihad against the Hausa kingdoms, one of the largest states in 19th-century Africa until British conquest in 1903.
Libreville (1849 CE): Capital of Gabon (1961–today).
Usman dan Fodio (1754 CE – 1817 CE): Fulani Islamic scholar and reformer who led a jihad against the Hausa kingdoms from 1804 and founded the Sokoto Caliphate.
Mungo Park’s second expedition down the Niger (1805–1806 CE): Park returned to West Africa with a government-backed expedition; most of his men died of disease before reaching the Niger. He built a boat at Sansanding and sailed past Timbuktu, but was killed at the Bussa rapids in present-day Nigeria.