This unique, new resource provides historical and technical foundations in the original uses of natural cement, and disseminates current information on contemporary practices and results of recent research. Over the past 20 years, there has been a growing revival in the use of traditional materials for the restoration and maintenance of historic buildings and structures. The pivotal role of natural cement in 19th and early 20th Century construction has been rediscovered, but new research is required to update and redefine our understanding of traditional materials and performance expectations in terms of modern standards and testing protocols. Topics cover: Mortar History; The Rise of Natural Cement; Historic Restoration; The Natural Cement Revival; First American Natural Cement ; Conference Papers; Second American Natural Cement Conference Papers; Supplemental Materials.