In philosophy, substance means, approximately, that element of an object without which it would not exist. In the millennia-old Aristotelian tradition[?], as well as early modern[?] traditions that follow it, substances are treated as having attributes[?] and modes[?].
... 21, 1558) was Holy Roman Emperor (as Charles V) from 1519-1558; he was also King of Spain from 1516-1556 -- officially as Charles I of Spain, although often referred to as ...