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This paper presents the first attempt to establish a Mid and Late Upper Palaeolithic absolute chronology of the Adriatic basin, including both eastern and western Adriatic coasts and their hinterlands. The proposed chronology for Gravettian, Early and Late Epigravettian techno-complexes is based on statistical analysis of 278 14C dates from 66 archaeological sites. Our analyses are directed towards 1) identifying whether major climatic episodes and corresponding transformations in the local environments are correlated with long-term demographic trends, and potential changes in spatial patterning of human occupation, and 2) identifying robust absolute chronological estimates of techno-complexes to establish the timing of their succession, including their possible overlaps. Results show that the Gravettian appears in the Adriatic area at c. 35-34ka cal BP and ends at c. 26-25ka cal BP. Early and Late Epigravettian timespans are between c. 26-25ka and 18.1–17.6ka cal BP and 17.6–17.1 ka and 11.9–11.6 ka cal BP respectively. The Early-Late Epigravettian transition in the Great Adriatic-Po Region coincides with the transition between GS-2.2 and GI-2.1 and is also associated with apparent transformations in settlement pattern as new biotopes appear to be occupied, particularly in the mountainous areas such as Alps and Dinaric Alps. According to our results, the timespan of Early Epigravettian covers the Badegoulian, Solutrean and even Lower Magdalenian periods in western Europe, hence challenging the earlier interpretations on Early Epigravettian and Solutrean contemporaneity. This suggests an independent cultural evolutionary path for territories that previously (during the Gravettian) showed a high degree of technological affinity. • First systematic collection and analysis of radiocarbon data for the Gravettian and Epigravettian of the Adriatic basin. • Bayesian modelling of 14C data points to synchronicity of local techno-complexes with the rest of Europe. • Gradual increase of the population since the LGM with associated shift in settlement patterns. [ABSTRACT FROM AUTHOR]