20th century 646
1945- 200
19th century 189
21st century 146
1970- 110
18th century 97
17th century 89
To 146 B.C. 77
To 1500 74
To 332 B.C. 56
16th century 54
1918-1945 40
1865-1918 31
1980-2020 31
To 622 31
1066-1485 26
1783-1865 25
1989- 24
1564-1616 22
Early modern, 1500-1700 22
To 634 22
1268-1559 19
1945-1970 15
332 B.C.-638 A.D. 14
Colonial period, ca. 1600-1775 14
To 1783 14
Victoria, 1837-1901 14
711-1516 13
To 640 13
1971- 12
1516-1700 11
Post-exilic period, 586 B.C.-210 A.D. 11
1868- 10
1945-1989 10
1950- 10
1960- 10
1960-1980 10
2001-2009 9
2002- 9
Civil War, 1861-1865 9
Ottoman Empire, 1288-1918 9
To 70 A.D. 9
1949- 8
1961-1969 8
To 1066 8
1801-1917 7
1933-1945 7
Medieval period, 1066-1485 7
Middle English, 1100-1500 7
Revolution, 1775-1783 7
1288-1918 6
1644-1912 6
168 B.C.-135 A.D. 6
1789-1900 6
1798- 6
1868-1912 6
1948- 6
1976-2002 6
1981-1989 6
1981-2001 6
221 B.C.-960 A.D. 6
Empire, 30 B.C.-476 A.D. 6
To 1800 6
To 476 6
Tudors, 1485-1603 6
-1400 5
15th century 5
1775-1865 5
1783-1850 5
1947- 5
1959- 5
1976- 5
2000- 5
476-1492 5
586 B.C.-70 A.D. 5
Anglo-Saxon period, 449-1066 5
Elizabeth, 1558-1603 5
Republic, 265-30 B.C. 5
Stuarts, 1603-1714 5
To 221 B.C. 5
1328-1600 4
1871-1918 4
1919-1933 4
1953-1961 4
960-1644 4
Empire, 284-476 4
Han dynasty, 202 B.C.-220 A.D. 4
Lancaster and York, 1399-1485 4
Louis XIV, 1643-1715 4
Revolution, 1789-1799 4
To 1200 4
To 527 4
1081-1453 3
1492-1648 3
1600-1868 3
1765-1947 3
1819-1892 3
1837-1901 3
1865-1921 3
1868-1945 3