Era
19th century
413
21st century
61
20th century
42
1945-1989
19
1945-
12
16th century
10
18th century
10
To 1500
9
17th century
7
1980-2020
5
1989-
5
1564-1616
4
1749-1832
4
1775-1865
4
2017-2021
4
1783-1865
3
1945-1955
3
1946-
3
1951-
3
1976-2000
3
1485-1603
2
1818-1883
2
1889-1951
2
1899-1959
2
1899-1992
2
1933-
2
1933-1945
2
1945-1964
2
1945-1970
2
1945-1991
2
1947-
2
1993-2001
2
2002-
2
2009-
2
Civil War, 1861-1865
2
Early modern and Elizabethan, 1500-1600
2
Empire, 284-476
2
Modern period, 1600-
2
Revolution, 1775-1783
2
To 1865
2
-1052
1
-337
1
1058-1111
1
1133-1189
1
1225?-1274
1
1558-1603
1
1619-1690
1
1632-1677
1
1638-1715
1
1643-1715
1
more ...