In 1906 Maude Abbott, James Carroll, and William MacCallum met at the Army Medical Museum in Washington DC to form the first organizing committee to establish the International Association of Medical Museums (IAMM). There they drafted invitation letters that were sent to leading museums of the world requesting them to join a new international organization that would allow the exchange of museum materials for teaching and research. One year later, the first documented meeting of the IAMM was held with prominent physicians from Canada, the United States, Germany, and the UK in attendance. From that meeting IAMM bylaws were developed, scientific programs were created, and the IAMM Bulletin became a valuable journal of pathologic anatomy. Not too long after, multiple IAMM divisions developed to include Austria, Belgium, Denmark, France, Holland, Ireland, Italy, Japan, and Scotland. The interactive timeline below highlights key moments along the history of this organization that from its seminal meeting over a century ago, have allowed it to become the International Academy of Pathology (IAP), the largest organization of physician-pathologists in the world.