Era
19th century
8
To 1847
5
To 1944
4
1794-1828
2
1809-1876
2
1847-1944
2
1980-
2
1780-1828
1
1780-1866
1
1794-1858
1
1795-1860
1
1799-1851
1
1816-1865
1
1819-1898
1
1829
1
1830-1890
1
1832
1
1835
1
1846-1944
1
1850's
1
1858
1
1861-1865
1
1868-1938
1
1869
1
1879
1
1938-
1
1971-1980
1
Coup d'état, 1980
1
Since 1980
1
b. 1820
1
d. 1851
1
fl. 1850
1