The Bacabs played an important role in the cosmological upheaval associated with Katun 11 Ahau, when Oxlahuntiku 'Thirteen-god' was humbled by Bolontiku 'Nine-god'.
The main source on the 16th-century Yucatec Maya, Bishop de Landa, combines the four Chaacs with the four Bacabs and Pauahtuns into one concept.