Era
20th century
367
1878-1944
333
1762-1878
208
1944-1990
194
1900-1999
156
19th century
133
1837-1873
101
1990-
76
Boris III, 1918-1943
70
1939-1945
57
Uprising, 1876
53
1882-1949
51
1848-1876
47
1800-1899
45
1944-
39
1918-1943
37
1854-1895
36
1894-1943
35
Since 1990
26
1821-1867
22
1941-1944
22
1722-1773
20
1861-1948
20
1876
20
1878-1912
20
1900 - 1999
19
To 1393
19
1856-1924
18
1909-1942
18
Ferdinand I, 1887-1918
18
1850-1889
16
1878 - 1944
16
681-1018
16
1840-1868
15
Since 1944
15
1739-1813
14
1929-1978
14
1185-1393
12
1879-1923
12
War of 1912-1913
12
1393-1878
11
1762-1899
11
1762-1944
11
1762 - 1878
10
1879-1967
10
1887-1918
10
1922-
10
1937-
10
21st century
10
approximately 876-946
10
more ...