DCCCLXVII

DCCCLXVII is the Roman numeral that represents the number 867. It is formed by adding the values D (500) + CCC (300) + LX (60) + VII (7), yielding 867. This form uses additive notation, with no subtractive combinations such as CD or XC.

In historical contexts, DCCCLXVII can be used to date events or inscriptions as 867 CE (Common Era). Roman numerals like this were common in scholarly works, inscriptions, and manuscripts in antiquity and the Middle Ages, and continue to appear in some classical or formal settings today.

The year 867 is notable in Byzantine history, when Basil I the Macedonian seized the throne and founded the Macedonian dynasty, marking a significant political shift and the beginning of a long-lasting dynasty that influenced Byzantine governance and culture for more than a century. The numeral also appears in contexts that reference the broader medieval period or in enumerated lists and chapters that employ Roman numbering.

Beyond dating, DCCCLXVII may serve as an illustrative example of additive Roman numeral syntax in educational materials. It demonstrates how large numbers can be constructed without subtractive notation, using straightforward addition of constituent symbols.

See also: Roman numerals; Basil I; Macedonian dynasty; Byzantine Empire; 867.