Era
1991-
349
20th century
181
Since 1991
142
1900-1999
53
21st century
40
1900 - 1999
25
1985-1991
19
Revolution, 1905-1907
19
2000-2099
18
1904-1914
15
1989-
13
Revolution, 1917-1921
12
Since 1989
12
1917-1921
7
1945-
7
1953-1985
6
19th century
6
1985-
5
2000 - 2099
5
1801-1917
4
1900-2099
4
1917-
4
1800-1899
3
1828-1910
3
1894-1917
3
Medieval, 500-1500
3
1711-1765
2
1799-1837
2
1800 - 1899
2
1855-1888
2
1870-1924
2
1878-1935
2
1894 - 1917
2
18th century
2
1904 - 1914
2
1905-1907
2
1914-1918
2
1936-1953
2
1939-1945
2
1945-1989
2
1945-1991
2
1950-
2
1975-1985
2
1990-
2
1992-
2
2011-2020
2
Civil War, 1994-
2
Nicholas II, 1894-1917
2
Since 1917
2
Since 1945
2
more ...