Résumé : Christian Knorr von Rosenroth was the author of a work called Messias puer, which universally has been considered lost. This article seeks to demonstrate that a manu- script currently catalogued as Historiæ evangelicæ initium is, in fact, this lost work of Knorr. Knorr’s involvement in the study of the Jewish mystical tradition enabled him to develop new and original insights in his reading of the New Testament. Furthermore, his use of comparative philology points to him as a significant precursor in the devel- opment of biblical studies.