The subject of this article claims attention for two special reasons. Firstly, and without any doubt, Grabe was one of the greatest atristic scholars of his age and lent lustre to the scholarly tradition at Oxford where his later years were spent. Secondly, his phenomenal patristic scholarship was inspired by a religious motive, which derived from his attachment to Lutheran Syncretism, a movement begun by the Helmstedt theologian Georg Calixtus (1586-1656). The problem of Grabe's neglect by historians is compounded by the confusion created by a contemporary account of the vital episode which brought him from Germany to Oxford and from Lutheranism to the Church of England. This article will therefore, draw together the scattered information which exists on Grabe's career and thereby remedy the neglect of historians, and dispel some of the confusion surrounding him.