This thesis focuses on the debate on well-established contemporary German approaches of Trinitarian theology by Magnus Striet, Bernhard Nitsche, Thomas Schärtl, and Jürgen Werbick. On one hand, these approaches are discussed within Christianity in regard to the conflicts between the positions of “social” and “Latin” Trinitarian theology. Foremost, however, a number of inquiries about Trinitarian approaches arise from the discussion with Islam, and the Christian approaches must prove their persistence in the interreligious dialogue regarding these inquiries. The central insight of this thesis is the existence of requests towards Trinitarian concepts since the early beginning of the Christian-Muslim dialogue in the 8th/9th century. These have been discussed within Christianity, yet are still important today.