DCLXXI

DCLXXI is the Roman numeral that represents the number 671. It is formed from the symbols D (500), C (100), L (50), X (10) twice (XX for 20), and I (1). In additive notation, D + C + L + XX + I equals 671, and no subtractive notation is required for this value.

Historically, DCLXXI would be used in contexts where Roman numerals are employed, such as year designations, chapter or volume numbering, or inscriptions. In modern usage, it may appear in historical texts, monuments, or lists that retain Roman numeral conventions. When used as a year, DCLXXI denotes the year 671 CE (or AD 671).

Beyond dates, the numeral itself is one of many ways to express integers in the Roman numeral system. It illustrates how Roman numerals combine fixed symbols with additive grouping to form larger numbers, without necessarily employing subtractive pairs (the subtractive principle is used for other values, e.g., IV for 4 or XL for 40).