(...) an Islamic-Christian dialogue must really and fundamentally have taken place in Jerusalem at the beginning of the 9th century. between a monk, let's call him Abraham of Tiberias, and a high Muslim personality, who could be 'Abd al-Rahman ibn' Adb al-Malik al-Hashimi. But the editor of the text of our dialogue has "arranged" a little freely the fundamental event, wrapped it in a sort of literary genre almost indispensable in the apologetic style of the time. from Marcuzzo, Le dialogue (1986), p. 101. Text of an apologetic dialogue widely widespread during the medieval period. Arabic text from the edition by Giacinto Boulos Marcuzzo (1986) fully vocalized and newly divised and indexed with front italian annotated translation.