The volume presents the contributions of a public lecture series in Tubingen, winter term 2012/13. The essays ask for the foundations of the manifold shape of modern European and Northamerican Christianity in dogmatic, cultural and ecumenical perspective. So, simple alternatives - like "historical" against "dogmatic" or "protestant" versus "ecumenical" - are relativized. Thus, the book shows up the development of diversity as well as possibilities to prevail over it. Whoever looks for a more nuanced perspective on the reformation jubilee, finds help in the volume announced.