"The sixteenth ruler [of Copan], Yax-Pasah, seemed obsessed by his hapless ancestor, because he repeatedly incorporated Waxaklahun-Ubah-K'awil into his own inscriptions, especially in Temple 11. Perhaps he was paying homage to his dead ancestor in defiance of K'ak'-Tiliw. In any case, less than three years after his accession, he planted the first of three altars in the middle of Waxaklahun-Ubah-K'awil's stelae. Furthermore, the symbolism of a double-headed feathered snake emphasized his desire to communicate with his dead ancestor through trance ritual. The undulating body of the snake arches over an inscription recording 18.104.22.168.0. (February 19, 766).
Thirty years later, long after the death of K'ak'-Tiliw, Yax-Pasah set up a second feathered serpent, bearing the date 22.214.171.124.0 (September 15, 795). And five years later, on 126.96.36.199.0 (August 19, 800), he completed the triangular arrangement with the largest altar of the three to form his earthly hearth. At dawn on the day of the period ending, the sky hearth in Orion was over the earthly one."
Linda Schele & Peter Mathews, The Code of Kings: The Language of Seven Sacred Maya Temples and Tombs, p. 171