This study presents the results of an archaeometric investigation of white marble votive reliefs from the Roman city of Pautalia (modern Kyustendil, Bulgaria), with the aim of clarifying patterns of material selection, production, and connectivity within the eastern provinces of the Roman Empire. Although these votive monuments, primarily dated to the 2nd and 3rd centuries AD, have long been examined from stylistic, iconographic, and epigraphic perspectives, the provenance of the marble used in their manufacture has remained largely unexplored. A total of 27 votive reliefs from urban and extra-urban sanctuary contexts were analysed using a multi-method approach combining petrographic analysis, stable isotope ratios (δ¹³C and δ¹⁸O), and trace element analysis by ICP-MS, and compared against an extensive geological reference database of ancient marble quarries. The results indicate a clear predominance of local and regional marble sources, alongside a limited but meaningful presence of imported material. This distribution pattern supports the existence of local workshops operating in or near Pautalia, which relied primarily on nearby quarry sources while selectively incorporating imported marble, likely through the reuse of pre-existing blocks or workshop offcuts rather than through systematic long-distance supply. These findings underscore Pautalia’s role as a regional production centre and as a nodal point within wider networks connecting the Aegean world and the Balkan hinterland.