<Tr> <Td> Solomon Islands </Td> <Td> HM Elizabeth II! Queen Elizabeth II (b . 1926) </Td> <Td> 000000001978 - 07 - 07 - 0000 7 July 1978 </Td> <Td> 7004143230000000000 ♠ 39 years, 78 days </Td> <Td> Constitutional </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Tuvalu </Td> <Td> HM Elizabeth II! Queen Elizabeth II (b . 1926) </Td> <Td> 000000001978 - 10 - 01 - 0000 1 October 1978 </Td> <Td> 7004142370000000000 ♠ 38 years, 357 days </Td> <Td> Constitutional </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> United Kingdom of Great Britain and Northern Ireland </Td> <Td> HM Elizabeth II! Queen Elizabeth II (b . 1926) </Td> <Td> 000000001952 - 02 - 06 - 0000 6 February 1952 </Td> <Td> 7004239710000000000 ♠ 65 years, 229 days </Td> <Td> Constitutional </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Kingdom of Bahrain </Td> <Td> </Td> <Td> HM Hamad bin Isa! King Hamad bin Isa (b . 1950) </Td> <Td> 000000001999 - 03 - 06 - 0000 6 March 1999 </Td> <Td> 7003677600000000000 ♠ 18 years, 201 days </Td> <Td> Khalifa! Al Khalifah </Td> <Td> Mixed </Td> <Td> Hereditary </Td> <Td> </Td> <Td> </Td> </Tr>

List of countries in the world at present