Alegrete

City · 1831 CE · in South America

Capital of Riograndense Republic (1836–1845).

Brussels (c. 1830 CE): Capital of Kingdom of Belgium (1830–today).
Abuja (1828 CE): Capital of Federal Republic of Nigeria (1991–today).
Dargo, Vedensky District (c. 1828 CE): Capital of Caucasian Imamate (1828–1858).
Paraná (c. 1834 CE): Capital of Argentine Confederation (1834–1861).
Nafplio (c. 1827 CE): Capital of First Hellenic Republic (1827–1832).
Kuching (1827 CE): Capital of Kingdom of Sarawak (1842–1946).
Malabo (1827 CE): Capital of Guinea (1968–today), Equatorial Guinea (1969–today).
Austin (1835 CE): Capital of Republic of Texas (1839–1845).
Coburg (c. 1836 CE): Capital of Saxe-Coburg and Gotha (1836–1839).
Houston (1836 CE): Capital of Republic of Texas (1837–1839).

Around the same time and place

José de San Martín (1778 CE – 1850 CE): Argentine general who led campaigns that freed Argentina, Chile and Peru from Spanish rule.
Independence of Brazil (1822 CE): Prince Pedro declared Brazil independent from Portugal by the Ipiranga stream in São Paulo and became Emperor Pedro I.
Paraguayan War (1864–1870 CE): War between Paraguay and the alliance of Brazil, Argentina and Uruguay, which devastated Paraguay and killed a large part of its population.
Tango (c. 1880 CE): Partner dance and music that emerged in the working-class districts of Buenos Aires and Montevideo in the late 19th century.
May Revolution (1810 CE): A week of events in Buenos Aires that removed the Spanish viceroy and created a local governing junta, starting Argentina's path to independence.
Bagé (1811 CE): Capital of Riograndense Republic (1836–1845).
Crossing of the Andes (1817 CE): San Martín's Army of the Andes crossed the mountains from Mendoza into Chile, one of the most celebrated feats of the wars of independence.
Piratini (c. 1836 CE): Capital of Riograndense Republic (1836–1845).