Era
20th century
16
1939-1945
4
1909-1946
3
1894-1988
2
1900-1999
2
1925-2004
2
1945-
2
1980-1989
2
20e siècle
2
21st century
2
1520-1572
1
1800-1999
1
1814-1861
1
1887-1953
1
1891-1974
1
1894-1980
1
1896-1978
1
1898-1968
1
1900-2099
1
1915-
1
1915-1996
1
1915-2006
1
1917-1945
1
1918-
1
1918-1945
1
1920-2005
1
1924-2012
1
1926-
1
1933-1945
1
1935-2003
1
1945-1955
1
1945-1980
1
1945-1989
1
1945-2021
1
1946-
1
1948-
1
1952-
1
1962-
1
1989-
1
19th century
1
20 w
1
Nero, 54-68
1
Occupation, 1939-1945
1
Poland
1
Primitive and early church, ca. 30-600
1
Since 1989
1
Wars of 1918-1921
1