Heinrich Tischner was a German Protestant minister for 32 years. He has an extensive website which includes a paper on the possible existence of Atlantis(a). He reviews the theories of a couple of German atlantologists, Otto Muck (Azores), Jürgen Spanuth (Heligoland) and finds flaws in both theories. While Tischner apparently accepts the existence of Atlantis he is disinclined to offer a theory of his own.
(a) Cross Thinker, Atlantis (heinrich-tischner.de) (German)*