What is "tizatlan"

Tizatlan, in pre-Columbian Mexico, was one of the four independent altepemeh (polities, sing. altepetl) that constituted the confederation of Tlaxcallan. Today Tizatlan is a part of the modern city of Tlaxcala, and the Pre-Columbian city is visible as a small archaeological site. The site is in the state of Tlaxcala in central Mexico.