In this contribution, the authors reflect on historical theology as theological discipline. The authors propose that historical theology be applied to different areas of research, namely prolegomena, history of the church, history of missions, history of theology, history of ecumenical theology or public theology and church polity. The point is made that historical theology, when properly structured and presented, could play a major role in enriching the theological and ecclesial conversation and in assisting the church in the process of reformation and transformation.