Era
20th century
27
21st century
10
1935-
2
1951-
2
1952-
2
20th Century
2
1818-1883
1
1865-1939
1
1874-1955
1
1893-1965
1
1900-1991
1
1903-1966
1
1909-
1
1916-2012
1
1917-1992
1
1930-
1
1931-
1
1936-
1
1937-
1
1940-
1
1941-
1
1943-
1
1946-
1
1947-
1
1954
1
1954-
1
1959-
1
1962-
1
1964-
1
19th century
1
2019-2025
1
Easter Rising, 1916
1