National Academy of Sciences of Belarus, University of Bern, University of Bern, University of Bern, Albanian Academy of Sciences, affiliation not provided to SSRN, University of Bern, University of Bern, Albanian Academy of Sciences, University of Bern, University of Bern, University of Bern, University of Bern, University of Oxford - School of Archaeology, affiliation not provided to SSRN, University of Bern and University of Bern