From 800 BC onwards, the Iron Age Celtic Hallstatt society became influential, replacing the Hilversum society. The southern area became dominated by the relevant Hilversum society (1800-800 BC), with seemingly cultural ties with Britain of the preceding Barbed-Wire Beaker lifestyle. The Funnelbeaker society (4300-2800 BC),connected to the Swifterbant lifestyle, erected the dolmens, big stone grave monuments uncovered in Drenthe.