Attempting to establish a more precise date for Leontius of Jerusalem, the author appraises again the arguments brought forward by Loofs and Richard and defends Loofs’s dating of Leontius’ treatise „Against the Monophysites“ to after 570. After that, he gives us new evidence which allows us to date the Nestorian treatise quoted by Leontius to after 612 and Leontius’ „Against the Nestorians“ to after 614. Consequently Leontius does not belong to the era of Justinian as was proposed by Richard and as has been taken for granted by the scholars. Instead, he must be seen in the completely different context of the seventh century. This opens the way for a new interpretation which should in the first place concentrate on the innovative traits of Leontius theology rather than stressing the elements he has in common with other authors of the mid-sixth century.