Era
20th century
83
19th century
55
Civil War, 1861-1865
52
1900-1999
30
21st century
17
1800-1899
14
War of 1812
14
1935-
12
1922-1995
11
1923-
11
18th century
10
1900 - 1999
8
1942-
8
2000-2099
8
2009
8
20e siècle
8
1815-1875
7
1929-2004
7
1945-
7
Early works to 1800
7
1939-1945
6
1954-
6
Revolution, 1775-1783
6
Spanish colony, 1540-1810
6
To 1848
6
1700-1799
5
1789-1869
5
1837-1912
5
1924-2018
5
To 1859
5
1800 - 1899
4
1868-1945
4
1933-1945
4
1936-
4
1944
4
1945-1989
4
1946-
4
1961-1975
4
Japanese occupation, 1941-1944
4
Ottoman Empire, 1288-1918
4
Since 1945
4
-1822
3
1801-1917
3
1821-1861
3
1860-1904
3
1868-1932
3
1914-1918
3
1919-1997
3
1937-
3
1939-1975
3
more ...