Symmetries in algebra and number theory (SANT)

These proceedings contain most of the contributions to the Göttingen-Jerusalem Conference 2008 on „Symmetries in Algebra and Number Theory“ including three addresses given at the conference opening, and two contributions to the Satellite Conference „On the Legacy of Hermann Weyl“. The contributions are survey articles or report on recent work by the authors, for exemple new results on the famous Leopoldt conjecture.