CXXXVIII

CXXXVIII is the Roman numeral for the integer 138. In classical Roman numerals, C represents 100, XXX represents 30, and VIII represents 8; when combined as C + XXX + VIII, they total 138. The notation uses additive components here, as opposed to subtractive forms such as XL for 40.

Historically, CXXXVIII may denote the year 138 CE (AD 138) in the Julian calendar. A notable event in that year was the death of the emperor Hadrian and the accession of Antoninus Pius, marking a transition in the Roman imperial throne. If used to indicate 138 BCE, it would refer to a year in the late Roman Republic or broader Mediterranean history, with events recorded in contemporary sources or later histories.

Beyond its value, CXXXVIII can appear in various contexts where Roman numerals are used for organization or labeling. It may designate a chapter or section number, a volume in a multi-part work, or an ordinal designation such as the 138th item in a regulated list. In modern typography and the naming of certain historical or ceremonial items, such numerals are used to evoke classical styling.

In summary, CXXXVIII primarily denotes the number 138, with historical relevance when used to mark a year (138 CE or 138 BCE) and broader applicability in enumerations that employ Roman numerals.