This volume looks at how religious identity and symbolic ethnicity influence migration. Religion - Christianity - was an important factor in European transatlantic migrations; religion - Islam - is a major issue in the immigration debate in "post-secular" Germany (and Europe) today. Essays focus on German missionaries and their efforts in the eighteenth century to establish new communal forms of living with Native Americans as religious encounters. In a comparative fashion, Islamic transnational migration into Germany in the twenty-first century is explored in a second group of essays that look at Muslim populations in Germany. They provide an insight into the ongoing discussions in Germany about modern migration and the role of religion.