Popol Hol's main achievement was to cement the mythology and institutions of Central Peten kingship at Copan, which lasted 400 years.

He declared himself the son of Kʼinich Yax Kʼukʼ Moʼ on Stela 63 and he claimed succession as the second king of Copan on the Xukpi Stone.

He planned the layout of the Copan acropolis, grand plaza, ballcourt, and temples with his father.

He buried his father in the Hunal structure that had been his home and court and built over it the Yehnal temple to honor him.

Both were decorated with stucco images of Yax Kuk Mo's name in a determined effort to create a cult of personality and aura of sanctity around his father which he and his progeny would inherit and thus justify their dynastic rule.