Other controversies relating to the Toltecs include the question of how best to understand the reasons behind the perceived similarities in architecture and iconography between the archaeological site of Tula and the Maya site of Chichén Itzá. No consensus has yet emerged about the degree or direction of influence between these two sites. Another source of controversy is the claims by New Age authors such as Carlos Castaneda and Don Miguel Ruiz, who claim to represent "Toltec" teachings, for this tradition of knowledge see Toltec (Castaneda).