Yaoundé

City · 1888 CE · in North Africa

Capital of Republic of Cameroon (1960–today).

Djibouti (1888 CE): Capital of Republic of Djibouti (1979–today).
Bangui (1889 CE): Capital of Central African Republic (1961–today).
Tokyo City (1889–1943 CE): Capital of Empire of Japan (1889–1943).
Addis Ababa (1886 CE): Capital of Ethiopia founded in 1886 by Menelik II and Empress Taytu; seat of the African Union.
Omdurman (c. 1890 CE): Capital of Mahdist State (1890–1899).
Harare (1890 CE): Capital of Rhodesia (1967–1978), Zimbabwe Rhodesia (1979–1979), Republic of Zimbabwe (1983–today).
Vryheid (1884 CE): Capital of Nieuwe Republiek (1885–1888).
Ashgabat (1881 CE): Capital of Turkmenistan (1992–today).
Kinshasa (1881 CE): Founded as Léopoldville by Henry Morton Stanley in 1881, it is the capital of the Democratic Republic of the Congo and one of Africa's largest cities.
Brazzaville (1880 CE): Capital of Free French (1940–1943).

Around the same time and place

Scramble for Africa (1881–1914 CE): Invasion, occupation and partition of almost all of Africa by European powers between the 1880s and 1914, formalised in part at the Berlin Conference of 1884–85.
HIV/AIDS pandemic (c. 1920 CE): Genetic studies trace the pandemic strain of HIV-1 to Kinshasa around the 1920s; AIDS was identified in 1981 and has killed tens of millions of people, with sub-Saharan Africa most affected.
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.
Congo Free State (1885–1908 CE): Colony privately ruled by King Leopold II of Belgium, where forced labour for rubber collection caused mass deaths; international outcry led Belgium to annex it in 1908.
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.
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).