Francisco (or Francesc) Sans Castaño (1868–1937) was a Spanish painter and engraver.
Born in Barcelona, he studied at the . He collaborated at the Hojas Selectas magazine. He was a member of the Barcelona's Circle of Fine Arts, a dissident organization of the .
He took part in the 1882, 1887, 1890, 1899 and 1910 National Exhibitions (winning an honorary mention in that of 1887) and in the 1911 World's Fair, winning a third-class medal.
References