The cave of La Pasiega offers many examples of overpaintings and repaintings, which allow attempts of a relative chronology: on the other hand, the great variety of techniques and colors employed make one think of a fairly extensive chronological sequence. The authors of the 1913 monograph ended by establishing three chronological phases which span practically the whole development of palaeolithic art: two Aurignacian phases, a Solutrean and a peak of two-color work (very rare in such paintings), which could be Magdalenian[20] Later Henri Breuil, one of the authors of the monograph, increased the decorative phases to eleven, within the same chronological framework.[21]