Some archaeologists such as Richard Diehl, argue for the existence of a Toltec archaeological horizon characterized by certain stylistic traits associated with Tula, Hidalgo and extending to other cultures and polities in Mesoamerica. Traits associated with this horizon are: The Mixteca-Puebla style of iconography, Tohil plumbate ceramic ware and Silho or X-Fine Orange Ware ceramics.[1] The presence of stylistic traits associated with Tula in Chichén Itzá is also taken as evidence for a Toltec horizon. Especially the nature of interaction between Tula and Chichén Itzá has been controversial with scholars arguing for either military conquest of Chichén Itzá by Toltecs, Chichén Itzá establishing Tula as a colony or only loose connections between the two. The existence of any meaning of the Mixteca-Puebla art style has also been questioned