This monograph is based upon a research project funded jointly by the American Institute of Architects and the American Hospital Association to explore and develop techniques in the architectural benchmarking of assisted living facilities for older persons. The study documents ten case studies that are reflective of the range and diversity of architectural manifestations present in the assisted living industry. Each case is documented via quantitative, narrative, and graphic means and presents both objective as well as evaluative information. The study also provides an exploratory investigation of how professionals may begin to distill patterns emerging in the field, some of which are most unexpected, illustrating the need for further empirical study.