Louis Massignon, a French Orientalist, was one of the distinguished figures in twentieth‑century Islamic studies. By interweaving historical research with phenomenology, he introduced a novel approach to understanding Islam and Shiism. The historical trajectory of his thought shows that his studies on al‑Ḥallāj, Salmān al‑Fārisī, and Fāṭima al‑Zahrā were not merely hagiographical accounts of mystical lives, but rather efforts to reconstruct the historical manifestation of faith within the social framework of Islam. This study, employing a descriptive‑analytical approach based on the historical method, draws upon Massignon’s original works as well as those of his disciples such as Henry Corbin, Christian Jambet, and Bernard Lewis to examine the impact of Massignon’s phenomenology of faith on the evolution of Western Islamology. The historiographical findings reveal that Massignon, by combining critical analysis of sources with empathetic reconstruction of religious experience, shifted Islamic studies from traditional, text‑centered Orientalism toward what may be termed a history of the manifestation of faith. The conclusion underscores that Massignon’s historical phenomenological method not only established a new form of understanding Islamic mysticism and Shiite history in the West, but also exerted a lasting influence on the modernization of research methodologies in the study of religion throughout the twentieth century