They wanted Britain to be the same religion so the country will be easier to control and there will be less arguments about religion and rules.
They are ceremonial leaders. Since as far back as the 17th century (and even much further), British monarchs have been limited in their ruling power in various ways, especially by the ruling privileges and responsibilities of the British Parliament. This arrangement is known as Parliamentarian Monarchy or, as it can also be called, Constitutional Monarchy.
it brought them closer together
You are going to have to narrow your question down to a date span, like a particular century, and a particular country or at least an area: like, for instance, English monarchs in the 16th century.
They are ceremonial leaders. Since as far back as the 17th century (and even much further), British monarchs have been limited in their ruling power in various ways, especially by the ruling privileges and responsibilities of the British Parliament. This arrangement is known as Parliamentarian Monarchy or, as it can also be called, Constitutional Monarchy.
Savages
During the 16th century, the English monarchs were members of the Tudor family. They included Henry VII, Henry VIII, and ended with Elizabeth I.
Most European nations were ruled by absolute monarchs in the eighteenth century. Some of these monarchs considered themselves enlightened despots.
Britain's monarchy dates from the ninth century.
The earliest records would suggest the Romans brought the religion to Britain.
Lots, if you look all around the world.
James 1 body was examined in 1853.
No they were not. The Romans left Britain in the late 5th century.