Era
20th century
45
1881-1938
31
1918-1960
26
Ottoman Empire, 1288-1918
20
1960-
17
1900-1999
16
Revolution, 1918-1923
14
1207-1273
11
1288-1918
11
1980-
11
-1320?
7
1918-1923
7
1960-1980
7
19th century
7
1873-1936
6
1873-1960
5
21st century
5
980-1037
5
Since 1960
5
Tanzimat, 1839-1876
5
To 1453
5
1842-1918
4
1878-1909
4
1909-
4
2008 - 2009
4
2008-2009
4
active 13th century
4
1288-1453
3
1489 or 1490-1588
3
1839-1876
3
1884-1958
3
1894-1929
3
2000-2099
3
973?-1048
3
Congresses
3
active 16th century
3
active 17th century
3
-1423?
2
-632
2
-740
2
-944 or 945
2
1058-1111
2
1495-1561
2
1495?-1556
2
1771-1826
2
1822-1895
2
1900 - 1999
2
1902-1963
2
1916-2016
2
1918 - 1923
2
more ...