X̅I, or "XI" with a bar over it, represents the Roman numeral for 11. In Roman numerals, letters are combined to signify values, and the bar indicates that the number should be multiplied by 1,000. This notation is often used in various contexts, such as mathematics and historical references. In addition to its numerical significance, X̅I can also appear in cultural or artistic works, where it may symbolize a specific theme or concept. Understanding Roman numerals, including I, V, X, and L, is essential for interpreting ancient texts and artifacts accurately.