Over the last fourteen-hundred years, Muhammad ibn ʿAbd Allah (d. 632) has been depicted and portrayed in a variety of ways by numerous scholars, theologians, and polemicists. My dissertation offers a unique approach to the “historical Muhammad” as it develops a new method to examine extant primary sources related to his life. I include available sources that provide pertinent information on Muhammad’s life, including the Qur’an, hadith literature, sira-maghazi (biographies and expeditions), and non-Muslim accounts. My research is original because it adopts current historical Jesus scholarship, particularly modern cognitive studies of memory, and uses it on extant sources related to Muhammad’s life. More specifically, I explore how memory, oral tradition, and oral transmission play vital roles in understanding how Muslims remembered their Prophet and how the circumstances of later generations shaped and influenced their commemoration of his life. By adopting this scholarship, which will be contextualized to examine early Muslim literature, I offer a new perspective on surviving sources, the context of seventh-century Arabia, and the function of memory for the nascent Muslim community. I also apply my method on eight significant, polemical, or neglected events that are traditionally believed to have taken place during Muhammad’s life in Mecca and Medina. In sum, my dissertation offers a dynamic cross-disciplinary venture, encompassing the intersection of innovative, modern critical inquiry and early Islamic literature. / Dissertation / Doctor of Philosophy (PhD) / This dissertation examines the field of the “historical Muhammad” and applies a new method on extant primary sources related to Muhammad’s life. I conduct a literature review of scholars’ reconstructions of his life, beginning as early as the seventh century. I also explore numerous primary sources on Muhammad, pointing out their benefits and disadvantages. Next, I overview the quests for the historical Jesus and analyze methods that were established over the last hundred years. In my dissertation, I adopt historical Jesus scholarship, namely memory studies, to develop an original method that provides a unique understanding and fresh perspective of the historical Muhammad. Over the last two chapters, I conduct eight case studies employing my method on events from Muhammad’s life in Mecca and Medina. This dissertation demonstrates that we could reconstruct a reasonably coherent picture of events surrounding Muhammad’s life.