DLXXX

DLXXX is the Roman numeral for the number 580. It is formed by adding the values of its constituent symbols: D equals 500, L equals 50, and XXX equals 30, giving 580. This arrangement uses additive notation, with no subtractive pair such as IV (4) or XL (40). In the standard ordering, larger values precede smaller ones.

In historical contexts, Roman numerals were commonly used to date events, dedications, monuments, and manuscripts. DLXXX could be used to indicate the year 580 in the Common Era (580 CE). In Latin inscriptions, numerals were typically written without spaces, so DLXXX would appear as a single string on stone or parchment.

In modern usage, DLXXX is rarely treated as a numeric expression; instead it may appear as an alphanumeric sequence in branding, model numbers, catalog codes, or other identifiers. Outside of numeral notation, its interpretation is determined by the conventions of the system in which it appears.

Related topics include the broader Roman numeral system, rules of additive and subtractive notation, and examples of other numerals such as D (500) and L (50).

See also: Roman numerals.