Il numero romano MDCCCXXVI nel sistema decimale vale: 1826.
MDCCCXXVI in latino si scrive mille octingenti viginti sex,
mentre in italiano milleottocentoventisei.
MDCCCVII, MDCCCVIII, MDCCCIX, MDCCCX, MDCCCXI, MDCCCXII, MDCCCXIII, MDCCCXIV, MDCCCXV, MDCCCXVI, MDCCCXVII, MDCCCXVIII, MDCCCXIX, MDCCCXX, MDCCCXXI, MDCCCXXII, MDCCCXXIII, MDCCCXXIV, MDCCCXXV, MDCCCXXVII, MDCCCXXVIII, MDCCCXXIX, MDCCCXXX, MDCCCXXXI, MDCCCXXXII, MDCCCXXXIII, MDCCCXXXIV, MDCCCXXXV, MDCCCXXXVI, MDCCCXXXVII, MDCCCXXXVIII, MDCCCXXXIX, MDCCCXL, MDCCCXLI, MDCCCXLII, MDCCCXLIII, MDCCCXLIV, MDCCCXLV