This research examines the dirhams and fulūs minted in al-Ma'mūniyyah-Ṣūr (Tyre) during the reign of the Abbasid Caliph 'Abd Allāh al-Ma'mūn (198-218 AH/813-833AD). These coins have not been previously studied. Through this research, they have been scientifically described in precise detail regarding their general form and inscribed texts, with analysis and interpretation of these inscriptions reflecting political, military, and economic events during Caliph 'Abd Allāh al-Ma'mūn's rule. I have classified these dirhams and fulūs into distinct styles, recording the mint city in two different formulations: on dirhams as "al-Madīnah al-Ma'mūniyyah-Ṣūr" and on fulūs as "Ṣūr al-Ma'mūniyyah." The coins minted in al-Ma'mūniyyah are rare and have not been addressed in any specialized academic study. The research examines two of the three recorded dirhams, representing two new styles, while the third dirham had been previously studied by another researcher. Each of these three dirhams represents an independent, distinct style with unique artistic characteristics, differing in general form and obverse/reverse inscriptions- except for the central obverse inscription and marginal reverse text which are similar across all three styles- and differing in mint dates. As for the fulūs, they have been classified into four styles, each containing unique artistic features not found in other styles. The study identified two new styles (the third and fourth) not previously documented in any scholarly study, all bearing the mint date 200 AH. The research clarifies the similarities and differences between the dirhams and fulūs minted in al-Ma'mūniyyah-Ṣūr, supplemented with eight plates and the study of additional specimens. Therefore, this research constitutes a significant contribution to Abbasid numismatics generally, and specifically to the coinage of al-Ma'mūniyyah-Ṣūr."