Achaeologist Ramón Carrasco, who excavated Calakmul's Structure IV, describes it as a place for rituals invoking the ancestors and supernatural beings. Its central building is spanned by a carved stone lintel portraying the king as the Maize God dancing at (or out of) the witz mountain. The structure was sanctified by many ritual caches that included human sacrifices and symbolic groupings of stones and shells. In Structure IV-B Carrasco discovered a tomb thought to be that of the king Tuun K'ab' Hix, who died sometime before AD 560. He was a powerful regent who extended Calakmul's influence far into Quintana Roo and the Peten lowlands, even presiding over the accession of Naranjo's king Aj Wosal in AD 546.

References:
Carrasco Vargas, Ramón. 1998. "The Metropolis of Calakmul, Campeche." In Schmidt et al., Maya, 381-82.
Schmidt, Peter, Mercedes de la Garza, and Enrique Nalda, eds. 1998. Maya. New York: Rizzoli, 644.
Carrasco Vargas, Ramón. 2000. "El Cuchcabal de la Cabeza de Serpiente." Arqueología Mexicana 7 (42): 17.
Laporte, Juan Pedro. 1995. "Preclásico a Clásico en Tikal." In Grube, The Emergence of Lowland Maya Civilization.
Laporte, Juan Pedro. 2000. "Ofrendas funerarias y cambio social en el Mundo Perdido, Tikal, Guatemala." Utz'ib 2 (8): 14-15.
Rodríguez Campero, Omar. 2000. "La gran plaza de Calakmul." Arqueología Mexicana 7 (42): 25-26.