Ostour, the ACRPS Journal for Historical Studies, in cooperation with the Department of History at the Doha Institute for Graduate Studies, held a symposium titled “Arab Historians and Their Sources”, on 29-30 April 2019, in Doha with participation from a number of historians and researchers from different Arab universities. The symposium revolved around four main themes and looked at two case study. The first theme relates to archive experiences; the way they are used, the challenges they pose and the importance of foreigners in dealing with many aspects of Arab history. The participants discussed the issue of multiple sources in the second theme, while the third focused on the history of the present and the fourth was devoted to the subject of biography and sources. In this context, the researchers were exposed to travel writings when the trip highlights the historian’s writing, and the trip itself becomes a source for writing biographies. The first case study explored the state of Ottoman sources, and the handling of these texts by Arab historians. The second study looked at the history of Palestine and researchers touched on the historians and researchers' dealings with the sources of the history of Palestine in different periods, and in varying research disciplines. In this issue, we will publish the third section of the symposium, represented by sources of the history of Palestine, containing three papers: “The History of the Marginalized in Palestine: from the Ottoman Rule to the Nakba and Beyond”; “Towards an Exit Plan from Micro- to Macro-History: the Documents of the Jerusalem Waqf as a Historical Source”; and “Colonialism in the Imaginary: Jerusalem in the Early Photograph.”