Title: Risālat Abī al-Rabīʻ Muḥammad ibn al-Layth min Hārūn al-Rashīd ilá Qusṭanṭīn malik al-Rūm
Description: Muḥammad, Prophet, d. 632; prophetic office; Islamic Empire; relations; Byzantine Empire; sources.
Subjects: Relations, Islam, Christianity, Christianity and other religions, Prophetic office, Ethnic relations, Interfaith relations, International relations