Historical Period
20th century
206
19th century
184
18th century
70
To 1500
39
21st century
37
17th century
25
Civil War, 1861-1865
19
Colonial period, ca. 1600-1775
16
Middle Ages, 500-1500
14
16th century
13
To 1865
12
1865-1950
10
To 500
9
1989-
8
1860-1935
7
1975-
7
1991-
7
Middle Ages, 600-1500
7
Renaissance, 1450-1600
7
1865-1918
6
1945-
6
1945-1989
6
1960-1980
6
Modern period, 1600-
6
1564-1616
5
1956-
5
1960-
5
1990-
5
Medieval, 500-1500
5
To 1775
5
1066-1485
4
1644-1912
4
1775-1865
4
1900-1999
4
1918-1932
4
1926-1984
4
1933-1945
4
1980-2020
4
1993-
4
960-1644
4
Early church, ca. 30-600
4
To 146 B.C
4
1712-1778
3
1775-1783
3
1789-1900
3
1806-1873
3
1830-
3
1867-1955
3
1874-1941
3
1877-1964
3
more ...