The perception of and interaction with ancient relics in past societies has been intensively debated in the archaeology of north-western Europe. This paper aims to make a contribution to this debate by reconstructing the long-term history of late prehistoric barrows and urnfields in Flanders (Belgium). The period between the Late Bronze Age and High Middle Ages (c. 1100 cal bc–ad 1300) is centred on. Contrary to Germany, Scandinavia and especially Britain, data from the Low Countries (Belgium and the Netherlands) have so far barely played a role in wider international and theoretical discussions on the role of the past in the past. Previous studies on reuse practices in the Low Countries mainly focused on the Meuse-Demer-Scheldt region of the southern Netherlands and north-eastern Belgium, which partly overlaps Flanders. These studies are combined and summarised. Their main outcomes are tested by means of a detailed inventory of reused late prehistoric cemeteries in Flanders. This study differs methodologically from most others in that it both offers an evidence-based overview of regional diachronic trends (documented at 62 barrow cemeteries and 13 urnfields) and discusses the developments at six sites yielding high resolution data. The observed reuse practices and site biographies appear to be remarkably dynamic and more diverse than previously suggested.