Cyfnod
20th century
26
21st century
16
19th century
11
1939-1975
8
1886-1939
5
1975-
5
1886-1931
4
16th century
3
18th century
3
1982-
3
To 1500
2
To 1800
2
15th century
1
1700-
1
1731-1808
1
17th century
1
1812-1898
1
1841-1920
1
1886-1931. \
1
1900-1983
1
1923-1930
1
1931-1939
1
1944-
1
2008-
1
Bourbons, 1700-
1
Civil War, 1936-1939
1
Dirty War, 1976-1983
1
Isabel I, 1474-1504
1
Napoleonic Conquest, 1808-1813
1
To 1830
1