Homoeopathic Materia Medica represents the systematic record of substances and their observed effects on healthy and diseased individuals. Its development began with Samuel Hahnemann's formulation of the principle of similia similibus curentur and his experiments with medicinal substances on healthy volunteers. During the nineteenth century, the materia medica expanded through provings, clinical observations, and the contributions of numerous homoeopathic physicians. Important developments included the publication of Hahnemann's Materia Medica Pura, Chronic Diseases, and later works by authors such as Constantine Hering, Timothy Field Allen, Adolph von Lippe, William Boericke, and James Tyler Kent.  This article reviews the historical evolution of Homoeopathic Materia Medica, its major contributors, methodological developments, and its continuing role in homoeopathic education and practice.