Era
20th century
29
1945-
6
21st century
5
1941-
4
1989-
3
2001-
3
1910-1921
2
1945-1989
2
1945-1991
2
War of Independence, 1919-1921
2
1765-1947
1
1859-1923
1
1882-1945
1
1893-1969
1
1901-1975
1
1906-1993
1
1922-
1
1923-
1
1923-2006
1
1925-
1
1931-
1
1944-
1
1945-1964
1
1945-1990
1
1952-
1
1953-
1
1956-2010
1
1991-
1
1993-2001
1
1997-2007
1
Easter Rising, 1916
1
Revolution, 1979
1
Soviet occupation, 1979-1989
1