Over the last 60 years, much analytical research has sought to determine the ore sources of ancient Greek silver artefacts. Lead isotopic analysis has played a key role in this endeavor. While most studies so far have limited their search to places mentioned in historical sources, the present study takes a different approach by first identifying Ag-bearing ore sources in the Aegean world based on their geological characteristics and then using Pb isotopes to determine whether they were exploited in antiquity. To this end, we have geolocated, sampled, and measured high-precision Pb isotopic compositions of 17 Ag-bearing mineralizations in Greece for which we have evidence of ancient mining activity, and a further 10 exhibiting minor Ag occurrences that may also have been exploited in ancient times. We found that Pb model ages provide better discrimination of ore sources than the more conventional plots of raw Pb isotope data.Our study establishes Lavrion, northeast Chalkidiki, Pangaeon, Thasos, Siphnos, Palaea Kavala, Angistron, and south Euboea as the most important ancient silver mining districts in Greece. Two previously undiscovered ancient mining areas in Pelion and in the Kroussia mountain range are also documented. The latter may be identified with ancient Mount Dysoron, from which King Alexander I of Macedon reportedly extracted the fabulous sum of a talent of silver per day. For the first time, we isotopically differentiate some of the mining districts in Thraco-Macedonia, and show that the mines of Thasos include geologically different silver-bearing ore sources. We further identify the hitherto unrealized importance of Euboean silver mines and demonstrate that they isotopically overlap those of Siphnos, with major implications for our understanding of ancient Greek history.Following this first step which underpins our sample selection, we undertook a broad, highprecision, Pb isotopic survey of the ores found at ancient mining localities in Greece with the expectation that improved state-of-the-art analytical quality would help associate Ag-bearing ores with metal use. The acquired high-precision Pb isotope data were used to calculate 'Pb model ages' using the parameters of Albarède and Juteau (1984) and the equations of Albarède et al. (2012). The advantage of Pb model ages is that they define ore provenance better than conventional two-dimensional plots of unprocessed (raw) Pb isotopic ratios by supplying additional information and clarity. Lead model ages establish the geological age of initial Pb segregation from the crustal source to form the ore precursor. The U/Pb (μ) and Th/U (κ) ratios, also deduced from the measured Pb isotopic abundances of the ores, constitute two additional sensitive parameters characteristic of their crustal source (Albarède et al., 2012;. Lead model ages tend to be distributed in well-defined frequency peaks which represent a useful and strongly visual tool (Milot et al., in press). By contrast, plots of conventional raw Pb isotopic ratios normalized to 204 Pb show stron...