Era
1729-1796
42
1826-1920
14
Catherine II, 1762-1796
14
1835-1908
12
1837-1898
12
-548
11
1717-1780
11
1728-1762
10
1763-1814
10
18th century
10
1832-1867
8
Justinian I, 527-565
8
1769-1821
7
1840-1927
7
624-705
7
European intervention, 1861-1867
7
1700-1799
6
1808-1873
6
1872-1918
6
15-59
5
1868-1918
5
Guangxu, 1875-1908
5
Julio-Claudians, 30 B.C.-68 A.D.
5
1102-1167
4
1689-1801
4
1875-1908
4
19th century
4
752?-803
4
Maria Theresa, 1740-1780
4
Stephen, 1135-1154
4
-65
3
1081-1453
3
1741-1790
3
1791-1847
3
1819-1901
3
30 B.C.-68 A.D
3
527-1081
3
815?-868?
3
Irene, 797-802
3
Nero, 54-68
3
Nicholas II, 1894-1917
3
Otto I, 936-973
3
Severans, 193-235
3
Theodosians, 379-455
3
approximately 42-62
3
-175
2
-1918
2
-217
2
104-140 or 141
2
1081-1118
2
more ...