Through a series of case studies from the mid-eighteenth century to the start of the twenty-first, this collection of essays considers the historical insights that ethno/auto/biographical investigations into the lives of individuals, groups and interiors can offer design and architectural historians. Established scholars and emerging researchers shed light on the methodological issues that arise from the use of these sources to explore the history of the interior as a site in which everyday life is experienced and performed, and the ways in which contemporary architects and interior designers draw on personal and collective histories in their practice.