The Roman numeral "CCCXXIX" represents the number 329. In this numeral, "CCC" stands for 300, "XX" represents 20, and "IX" indicates 9. When combined, these values total 329. Roman numerals are a numeral system originating from ancient Rome, using combinations of letters from the Latin alphabet. In modern contexts, the number 329 can be found in various applications, such as in mathematics, historical dates, or even as a designation for specific items. For example, it could refer to a street number, a model of a product, or a significant year in history, depending on the context.