Sissel Schroeder, head of the Department of Anthropology at UW-Madison, will lead the 1 p.m. tour. Schroeder’s expertise includes the micro-historical investigation of households, ancient architecture, planned communities and built landscapes as expressions of social order. Aztalan had homes, a public plaza and at least four platform mounds. One served as the base of a home for a leader, another held a mortuary building, and another a temple.