The volume summarizes the most important discoveries made on the site of the necropolis of the Acciaierie di Terni, discovered at the end of the nineteenth century and immediately appeared as fundamental for outlining the history of southern Umbrian culture. In particular, the text focuses on the most ancient phases of the necropolis (Final Bronze-I Iron Age), with some references to the most recent phases. The first part of the volume is dedicated to the history of research and studies and to a geographical framework, with the formulation of a hypothesis about the location of the inhabited area pertaining to the early stages of the necropolis. This is followed by the revision of the publications of the late 800th-early 900th century, the presentation of important unpublished archive papers, the catalog of part of the materials kept in the Terni Art Gallery, the typological classification. Finally, a proposal of relative chronology is presented, together with the analysis of the rite and of the funerary objects with particular reference to the reconstruction of the social organization of the protohistoric community of the Steelworks.