Researchers have identified hundreds of graves, from Transylvania to England, that were reopened between the 5th – 7th centuries AD. Previously, it was thought examples of reopened graves from this period reflected isolated cases of grave robbery. However, new research argues this was actually a widespread practice that was part of regular mortuary customs. The main motivation for these reopenings was to take out certain types of artefact. But actions taken include removing objects, moving bodies around, and in one case adding a dog to the burial.