On 29 February 2008, the management of the Institute of Archaeology and Ethnology of the Polish Academy of Sciences and the scientific editors of 'Archeologia Polski' celebrated officially the 90th birthday of Professor Witold Hensel, longtime director (1954-1989) of what was then the Institute of History of Material Culture (from 1992 the Institute of Archaeology and Ethnology) PAN. The special volumes of 'Archeologia Polski' and of 'Slavia Antiqua' were presented to W. Hensel and the meeting continued as a small conference on the ethnogenesis of the Slavs. 2 Figures.
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