Headings: Diether von Isenburg, archbishop of Mainz Publication of the Bulla 4 Dec. 1480 'Domini et salvatoris nostri' concerning the indulgence for the war against the Turks, Aschaffenburg, 28 Febr. 1482. Add: Sixtus IV: Breve 15 Mar. 1480/81 to the Franciscans