Era
20th century
221
1900-1999
88
19th century
88
21st century
77
1939-1945
50
1800-1899
31
18th century
31
Civil War, 1861-1865
25
2000-2099
24
Bombardment, 1945
24
1933-1945
21
1650-1726
20
1945-
19
2001-2009
19
1723-1790
18
1946-
17
1989-
16
17th century
15
1945-1989
14
1900-2099
13
16th century
12
1993-
12
1724-1804
11
1809-1865
11
1700-1799
10
1800-1999
10
2003-2011
9
1775-1865
8
1906-1975
8
To 1500
8
1564-1616
7
1770-1831
7
1904-1967
7
1914-1918
7
1939 - 1945
7
2008-2009
7
1225?-1274
6
1670-1729
6
1990-
6
2001-
6
1600-1669
5
1869-1948
5
1884-1972
5
1901-1981
5
1906-2005
5
1948-
5
1991-
5
1993-2001
5
Civil War, 1642-1649
5
German occupation, 1940-1945
5
more ...