Three different areas of Church History are touched by the essays collected in this tripartite volume. The first part is formed by seven studies in ancient Christianity, examining the origin of the soul, Jerome's view on bishops (and its reception in reformation times), the Jewish-Christian-relationship and finally the Athanasian Creed. In the second part four studies deal with the history and piety of Germans in Russia in the 19th and 20th Century. The third part collects five essays related to the history of Oldenburg: St. Lambert and its church, baroque theology and the centennials of the reformation in 1817 and 1917.