Institut fur Infektionskrankheiten. Robert Koch's Insitute, in which paul Enrlich worked. The old building.

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: Institut fur Infektionskrankheiten. Robert Koch's Insitute, in which paul Enrlich worked. The old building. Wellcome Collection. Source: Wellcome Collection.