Cyfnod
20th century
39
19th century
11
20th-century
5
18th century
4
1902-1991
4
17th century
3
Modern period, 1500-
3
1727
2
War of Independence, 1821-1829
2
-approximately 36
1
1432-1481
1
1491-1547,
1
15 B.C.-19 A.D.,
1
1600-1659
1
1600-1699
1
1699
1
1729-1796
1
1760-1770
1
1771
1
1797-1864
1
1798-1857
1
1864-1936
1
1871-1941
1
1883-1933
1
1900-2001
1
1903-1995
1
1905-1990
1
1920-1996
1
1925-1994
1
1930-1939
1
1940-
1
1940-2008
1
1950
1
1951
1
1957-2009
1
1960-1969
1
1967-1974
1
1970-1979
1
1974-
1
21st century
1
439-533
1
approximately 1405-approximately 1472
1
approximately 958-1025
1