Era
20th century
41
1900-1999
25
19th century
22
21st century
19
1800-1899
13
1946-
11
2000-2099
8
1732-1799
7
2017-2021
7
1800-1999
6
1898-1935
6
1911-1978
5
1945-
5
1225?-1274
4
17th century
4
1900-2099
4
1925-1995
4
Revolution, 1917-1921
4
Since 1945
4
Since 2020
4
16th century
3
1800-1837
3
1910-1946
3
1919-1947
3
1933-1945
3
1945-1989
3
Early church, ca. 30-600
3
To 1500
3
1500-1599
2
1600-1699
2
1603-1714
2
1743-1826
2
1783-1865
2
1795-1821
2
1813-1855
2
1815-1870
2
1865-1918
2
1876-1960
2
18th century
2
1909-1998
2
1917-1921
2
1918-
2
1937-
2
1941-
2
1945-1953
2
2000-
2
30-600
2
476-1492
2
600-1500
2
735-804
2
more ...