Archaeological research is providing new insights into the tombs and catacombs along the ancient Via Labicana in Rome. Analysis of burials in the Mausoleum of Helena and the Church of Saints Peter and Marcellinus has revealed details about those interred. Isotope analysis indicates the individuals came from various backgrounds, with some migrants from North Africa. Personal items and burial styles, such as the use of plaster, suggest these were members of the Equites Singulari Augusti, the personal cavalry of Roman emperors. Ongoing study of the human remains, textiles, and artifacts is enhancing understanding of this non-homogenous group.