Il numero romano CCLXIII nel sistema decimale vale: 263.
CCLXIII in latino si scrive ducenti sexaginta tres,
mentre in italiano duecentosessantatré.
CCXLIV, CCXLV, CCXLVI, CCXLVII, CCXLVIII, CCXLIX, CCL, CCLI, CCLII, CCLIII, CCLIV, CCLV, CCLVI, CCLVII, CCLVIII, CCLIX, CCLX, CCLXI, CCLXII, CCLXIV, CCLXV, CCLXVI, CCLXVII, CCLXVIII, CCLXIX, CCLXX, CCLXXI, CCLXXII, CCLXXIII, CCLXXIV, CCLXXV, CCLXXVI, CCLXXVII, CCLXXVIII, CCLXXIX, CCLXXX, CCLXXXI, CCLXXXII