King Charles V/Charles I (1500–1558) — SummaryCharles ruled Aragon and Castile (Spain) as Charles I from 1516–1556 and the Holy Roman Empire as Charles V from 1519–1556, making him one of the most powerful monarchs of the 16th Century.
Polk, James Knox - BiographyMany historians consider 11th U.S. President James K. Polk to be one of the more effective chief executives because he delivered on nearly all of his campaign promises.
