Explores the social structures of the Roman world by analyzing the plans of buildings of all sizes from slightly Romanized farms to palaces. The text assesses how the ways in which the rooms are grouped together; how they intercommunicate; and the ways in which individual rooms and the house are approached, reveal various social patterns, which question traditional ideas about the Roman family and household. The text argues that virtually all houses were occupied by groups of varying composition, challenging the received wisdom that they were single family houses whose size reflected only the owner's wealth and number of servants. Provides an examination of the relationship between the living quarters of the Romans and their social and economic development which introduces a new area in Roman studies and a corpus of material for further analysis. The inclusion of almost 500 ground plans, drawn to a uniform scale, allows the reader to compare the similarities and differences between house structure as well as illustrating the arguments.