Era
1801-1917
28
20th century
28
1894-1917
25
19th century
20
1991-
11
1904-1914
8
Since 1991
8
21st century
7
Revolution, 1917-1921
7
1689-1801
6
1870-1924
6
1894-1999
6
1900-1999
6
1917-1936
6
1800-1899
5
1801-1999
5
Nicholas II, 1894-1917
5
1533-1613
4
1613-1689
4
1855-1881
4
1861-1917
4
1871-1918
4
1952-
4
To 1867
4
1672-1725
3
16th century
3
17th century
3
1800-1917
3
February Revolution, 1917
3
Revolution, 1905-1907
3
1745-1819
2
1796-1918
2
1800-1999
2
1859-1941
2
1864-1918
2
1865-1936
2
1868-1918
2
1878-1953
2
1946-
2
1989-
2
Edward VII, 1901-1910
2
George V, 1910-1936
2
To 1533
2
William II, 1888-1918
2
1288-1918
1
1462-1605
1
1500-1599
1
1500-1613
1
1500-1799
1
1530-1584
1
more ...