Cyfnod
19th century
8
Civil War, 1861-1865
8
1951-
7
1865-1950
6
20th century
4
1775-1865
3
21st century
3
1861-1865
2
1946-
2
1989-
2
2001-2009
2
1621-1683
1
1744-1822
1
1767-1845
1
1789-1797
1
1805-1869
1
1808-1889
1
1809-1865
1
1814-1865
1
1815-1861
1
1821-1894
1
1825-1866
1
1845-1861
1
1847-1918
1
1849-1861
1
1857-1861
1
1863-1877
1
1865-
1
1865-1945
1
1877-1964
1
18th century
1
1908-1973
1
1940-
1
1963-1969
1
1964
1
19th cnetury
1
2001-
1
Colonial period, ca. 1600-1775
1
Economic conditions
1
Since 1951
1
To 1775
1