ɪn wˈʌn θˈaʊzənd fˈaɪvhˈʌndɹɪd θˈɜːɾi sˈɛvən, dʒˈɑːn fɹˈɛdɚɹˌɪk ˈaɪ, ᵻlˈɛktɚɹ ʌv sˈæksəni ɛɡzˈɛmptᵻd hˌɪm fɹʌm hɪz ᵻklˌiːzɪˈæstɪkəl dˈuːɾiz ænd əfˈɪʃəli kəmˈɪʃənd hˌɪm tə wˈɜːk wɪððə dˌɑːkjuːməntˈeɪʃən ʌv lˈuːðɚz wˈɜːk.
In 1537, John Frederick I, Elector of Saxony exempted him from his ecclesiastical duties and officially commissioned him to work with the documentation of Luther's work.