The reconstruction of the town and the cathedral was influenced particularly by the archaeologist and monument conservationist Walter Bader, and lasted until 1966. Expellees from East Prussia were resettled in Xanten and caused the population to rise by almost 40%. In the course of the local re-organization in 1969, the localities "Birten", "Lüttingen", "Marienbaum", "Obermörmter", "Vynen" and "Wardt" were integrated into Xanten, so that around 16,000 inhabitants lived within the town boundaries. The area of the town increased from 8 km2 to 72 km2.