Glass fragments from central European trading centres from 3rd to 6th centuries AD are handled and analysed to tell about the far-reaching trade connections between the Black Sea area and Central- and North Europe. The analsye is based on a selection of North- and Central European trading centres situated outside the Roman empire and characterised by rich culture layers containing precious metals, jewellery, coins, Roman and Frankish import as  for example fragments of drinking glasses. The paper shortly present a selection of such trading sites: the Danish site "Sorte Muld" on the island of Bornholm and "Gudme/Lundeborg" on the Danish isle Funen; furthermore the paper deal with the South Swedish site "Uppåkra" and the Polish site "Jakuszowice" nearthe city Krakow.