Do herrschers age?

Could you elaborate on the concept of aging in relation to herrschers? Are they subject to the same biological processes of aging as human beings, or do they possess some form of immortality? Is there any evidence or speculation in the literature or community that suggests how herrschers may or may not age? Understanding the nature of aging in herrschers could have significant implications for their longevity, capabilities, and role in society or mythology. Could you please expand on this topic?