Mosques and Islamist Activism: Spatial Evidence from Interwar Cairo

Why do Islamists mobilize in some mosques, but not others? We answer this question by matching a list of mosque-based lectures, sermons, and collections carried out by the Egyptian Muslim Brotherhood in interwar Cairo. These findings deepen our understanding of the conditions under which certain mosques become sites for Islamist mobilization, and demonstrate how historical spatial data can be utilized to study political activism.