Era
20th century
15
1870-1924
8
1945-
5
1945-1980
4
Revolution, 1917-1921
4
1869-1907
3
1882-1971
3
19th century
3
1473-1543
2
1564-1616
2
1813-1901
2
1821-1881
2
1840-1893
2
1852-1913
2
1858-1924
2
1882-1937
2
1884-1953
2
1885-1939
2
18th century
2
1510-1568
1
15th century
1
1606-1669
1
1622-1673
1
16th century
1
1731-1818
1
1756-1791
1
1784-1832
1
1793-1876
1
17th century
1
1803-1856
1
1810-1857
1
1813-1883
1
1818-1893
1
1819-1872
1
1824-1884
1
1828-1906
1
1836-1891
1
1839-1881
1
1846-1916
1
1851 or 2-1915
1
1857-1952
1
1862-1921
1
1867-1936
1
1870-1936
1
1871-1951
1
1874-1941
1
1875-1937
1
1881-1919
1
1881-1955
1
1887-
1
more ...