Nobody. The monarch ruled and rules his or her subjects. There are limits on the power of the monarch, a lot more now than formerly, but being subject to limits does not mean you are ruled by someone else.
50 years or more
Queen Victoria ruled for 64 years. The present queen Elizabeth ll has ruled for 60 years so far and is still going strong.
The English monarch had absolute power and ruled by divine right.
A king is a monarch. A country ruled by a king and/or queen is called a monarchy.
sardina and peidmont
Oliver cromwell
Viceroyalties
Probably Lady Jane Grey, since she only ruled for 13 days, though "least successful" is highly subjective
Oliver Cromwell
The answer is Queen Victoria
a monarchy ruled by a direct monarch.
A royal colony is headed by kings.