In The Book of Chilam Balam of Chumayel, it is said:
Katun 11 Ahau is set upon the mat, set upon the throne, when their ruler is set up.... The heavenly fan, the heavenly wreath and the heavenly bouquet shall descend. The drum and rattle of the lord of 11 Ahau shall resound, when flint knives are set into his mantle.... Ahau 11 is the beginning of the count, because this was the katun when the foreigners arrived...