This book is a report on excavations at the Aztec-period site of Yautepec, in the Mexican state of Morelos. Excavations focused on domestic structures, particularly their architecture and associated rich midden deposits. Most residents lived in small ground-level houses built of adobe bricks, while elites lived in larger, raised compounds with more luxurious architecture. In addition to descriptions of the excavations, and a new detailed chronology, the volume includes detailed descriptions of ceramic vessels and objects, obsidian tools, ground-stone tools, and other materials. The results of chemical sourcing of ceramics, obsidian, and metal artifacts is also reported, as well as studies of human skeletal remains from burials. This report sheds light on patterns of inequality and social class, long-distance trade, and responses to Aztec conquest, at the level of the household. It is one of the most complete reports yet published on excavations at an Aztec-period site.