Cyfnod
20th century
23
21st century
10
Siglo 20
5
Siglo XX
4
1970-1973
3
1974-
3
1980-
3
Siglo 21
3
1908-1973
2
1920-1970
2
1973-
2
1973-1988
2
1975-
2
1975-1982
2
1988-
2
2000-
2
S XX
2
1824-1920
1
1870-1924
1
1876-1924
1
1891-1937
1
1895-1979
1
1931-1939
1
1946-1970
1
1968-1980
1
1974-1999
1
1983-2002
1
1999-
1
19th century
1
2002-
1
21st century
1
Republic, 1931-1939
1
S XIX
1
Siglo XXI
1