This article explores the ministry of service and love of neighbour exercised by Katharina Schutz Zell, wife of the Strasbourg Reformer Matthias Zell, focusing on Schutz Zell's theological justification for her ministry and her attempts to help those around her to understand their suffering in terms of the Gospel. Following Luther, Schutz Zell saw love of neighbour as an important means of spreading the Gospel, and thus as private activity, but as public ministry. Her work exemplifies, and may have served as a model for, the role of (female) deacon as defined by the Reformed tradition.