Era
20th century
153
19th century
140
1910-1921
92
1922-
47
21st century
30
Easter Rising, 1916
28
18th century
27
1848-1929
16
1864-1916
16
1901-1910
15
17th century
14
1895-1967
14
1856-1918
13
1875-1915
13
1819-1891
12
1879-1916
12
War of Independence, 1919-1921
12
1744-1817
11
1884-1920
10
1865-1953
9
1882-1959
9
1564-1616
8
1660-1688
8
1850-1894
8
1858-1916
8
1864-1928
8
1872-1949
8
1882-1975
8
1837-1901
7
1851-1948
7
1864-1939
7
1864-1951
7
1865-1939
7
1879-1920
7
1922-1949
7
To 1500
7
1867-1945
6
1882-1941
6
1890-1944
6
1767-1849
5
1800-1837
5
1842-1928
5
1857-1932
5
1872-1922
5
1887-1975
5
1906-1989
5
1977-
5
Civil War, 1861-1865
5
Early modern, 1500-1700
5
16th century
4
more ...