This article investigates the transformation of the body of a female child murderer as she passed through specific spatial configurations in the urban setting of the seventeenth-century capital of Denmark–Norway. By using the case of Gertrud Nielsdatter, we explore the significance of public urban spaces in the bodily and material transformation of a woman from a condemned sinner to an object of scientific wonder. This transformation was facilitated by practices in diverse public spaces – controlled or influenced by government, city, church, as well as academic authorities and stakeholders – such as the city court, the place of execution, the university and, not least, the book shops across Europe selling books containing the print representing internal organs of Gertrud Nielsdatter. The case demonstrates how the physical body of an ordinary – yet outlawed – Copenhagener was repeatedly transformed in interaction with public spaces and the material culture of buildings, fixtures and fittings.