Era
1566-1799
1
1648-1789
1
1700-1900
2
1757-1831
1
1769-1821
1
1770-1850
1
1770-1861
2
1773-1859
3
1787-1874
1
1788-1824
1
1789-1815
1
1789-1900
1789-1917
1
1789-1918
1
1789-1999
2
1796-1918
2
1801-1917
2
1809-1886
1
1815-1848
2
1815-1870
6
1815-1871
1
1815-1898
3
1818-1883
2
1822-1893
1
1844-1900
1
1848-1871
1
18th century
7
1989-
1
19th century
23
20th century
8
Frederick William III, 1797-1840
1
Revolution, 1775-1783
1
Revolution, 1789-1799
3
Since 1789
1
Victoria, 1837-1901
2