Era
20th century
28
20th century --
8
To 146 B.C.
7
1992-
5
19th century
5
21st century
5
1968-
4
332-30 B.C
4
Egypt
4
To 332 B.C.
4
1869-1948
3
1903-1990
3
1925-
3
1929-1968
3
1969-
3
1990-
3
19th century --
3
221 B.C. --
3
960 A.D.
3
Rome
3
To 146 B.C
3
1452-1519
2
1564-1616
2
1880-1968
2
1895-1962
2
1922-1976
2
1933-1945
2
1934-
2
1939-
2
1955-
2
1957-
2
1964-
2
1965-
2
1973-
2
1981-
2
1982-
2
1985-
2
1986 --
2
1994-
2
265-30 B.C.
2
476-1492
2
To 640 A.D.
2
to 146 B.C
2
to 332 B. C.
2
1037
1
1162-1227
1
1185-1868
1
1254-1323
1
1279
1
1452- 1519
1
more ...