CCXX is a Roman numeral that represents the number 220. In the Roman numeral system, "C" stands for 100, and "X" stands for 10. Therefore, CCXX is calculated as 100 + 100 + 10 + 10, totaling 220. This numeral can be found in various contexts, such as in historical documents, clocks, and architectural designs. Roman numerals are often used for decorative purposes and to denote significant events, like the year of a movie release or the numbering of a monarch, such as Queen Elizabeth II.