About Reign
A reign is the period of a person's or dynasty's occupation of the office of monarch of a nation, of a people or of a spiritual community. In most hereditary monarchies and some elective monarchies there have been no limits on the duration of a sovereign's reign or incumbency, nor is there a term of office. Thus, a reign usually lasts until the monarch dies, unless the monarchy itself is abolished or the monarch abdicates or is deposed.
Biography source:
Wikipedia
