Era
20th century
2,604
19th century
554
1944-1989
543
1914-1944
477
1989-
420
21st century
397
1850-1889
186
To 1711
125
Revolution, 1989
106
1900-1999
105
18th century
104
1914-1918
101
1907-1986
97
1945-1989
88
1991-
88
1895-1961
69
1876-1957
60
1866-1914
56
Revolution, 1848
50
17th century
49
1918-1945
48
1821-1914
43
Charles I, 1866-1914
42
1852-1912
41
1881-1955
39
1945-
39
1711-1821
37
1882-1946
35
1911-1995
35
1871-1940
34
To 1500
34
16th century
33
Great Union, 1918
33
War of Independence, 1876-1878
31
1880-1967
30
1921-2017
30
1821-1859
28
2000-2099
28
1821-1866
27
approximately 1435-1504
27
1890-1940
24
1673-1723
22
1942-
21
1839-1914
20
1893-1953
20
1928-
20
1839-1889
19
1875-1938
19
1880-1955
19
1907-1945
19
more ...