In areas affected by immigration in the Ruhr area and Westphalia, as well as in some large cities, religious landscape changed substantially, especially in Westphalia through Protestant immigration from the eastern provinces.
Religious landscape changed substantially through Protestant immigration from the eastern provinces. This was especially in Westphalia. This was in areas, as well as in some large cities. These areas were affected by immigration in the Ruhr area. These areas were affected by immigration in Westphalia.