The aim of this article is to introduce the museum we have at the Pathology Department, School of Medicine of the National University of Rosario, Argentina. The origin dates from to 1922 when Dermatology Professor Dr. Enrique P. Fidanza bought moulages at L'Hôpital Saint-Louis in Paris for the purpose of teaching. The collection included around 100 moulages and was worth approximately 1000 dollars. These pieces were exhibited at the Dermatology Department for many years and later moved to the Pathology Department where some pieces started being repaired, whereas others have deteriorated. The collection is composed of 100 moulages done by a French craftsman by the name of Niclet and 258 made by Argentine craftsmen including Alba Ramirez and G. Rouzaut, among others. The pieces are classified according to different dermatological diseases such as: the different stages of syphilis, lupus, benign and malignant neoplasm, infectious diseases, etc.