CCCVI

CCCVI is the Roman numeral for the number 306. It is formed by combining three hundreds (CCC) with six (VI), yielding 300 + 6 = 306. In Roman numerals, this form is additive, with no subtractive notation involved.

In historical dating, CCCVI denotes the year 306 CE (AD 306). That year is notable for the death of Constantius Chlorus and the declaration of Constantine the Great as emperor by his troops, an event that helped shape the early structure of the later Roman Empire.

Beyond dating, CCCVI may appear in lists, catalogs, or volumes that use Roman numerals to label items, chapters, or sequences. Roman numerals like CCCVI are often encountered in inscriptions, monuments, and older manuscripts, where they serve as a conventional numerical system distinct from Arabic numerals.

Overall, CCCVI is primarily recognized as the additive Roman numeral for 306, with its usage extending to dates and labeling in historical and scholarly contexts.