The Roman numeral "CDLXXVI" represents the number 476. In Roman numerals, "CD" stands for 400, "LXX" represents 70, and "VI" equals 6. When combined, these values add up to 476. Roman numerals are a numeral system originating from ancient Rome and were widely used throughout the Roman Empire. The number 476 is historically significant as it marks the year when the last Roman emperor of the West, Romulus Augustulus, was deposed. This event is often cited as the end of the Western Roman Empire, leading to the beginning of the Middle Ages in Europe.