Johann Heinrich Callenberg’s Arabic Publications of De Veritate to the Conversion of Jews and Moslems

In the missionary activities that Halle theologians developed in the first half of the 18th century Grotius’ De veritate plays an interesting role that deserves exploration. To that purpose, the history and nature of the publication of missionary tracts in Halle will be surveyed, the role therein of Johann Heinrich Callenberg and his Institutum Judaicum at Muhammedicum described and the distribution and reception of the texts among the Muslims and Jews that were the target of the Halle missions all over the world summarized and analysed. It is suggested that Grotius’ De veritate, which was an atypical piece of apology in the Halle pietist setting, stands out among the other literature for its efficacy in the missionary process, due to its non-dogmatic character.