(born 1957) is a German author, doctor and ordained minister who is living in Nürnberg, Germany.
[1] He is the author of a large body of scholarly books, articles and essays on the subjects of Theology, Religion, Christianity, and Church History.
He has assisted other scholars in producing fundamental works about New religious movements and documented the development and leading figures in minor churches such as the Lutheran John Ernest Grabe and Richard Williams Morgan, founder of the Ancient British Church.
[1][2][3] His work has been reviewed by sources such as The Journal of Ecclesiastical History, (a Cambridge University journal) and is widely cited by his peers.
[4][5] A number of articles has been published in The Oxford Dictionary of National Biography, Biographisch-Bibliographisches Kirchenlexikon, and Anglo-Orthodoxy and Church and King.