This chapter integrates Michel Foucault's historiographic approach with media history. After describing how Foucault's work has traditionally been used and understood by media historians, four areas of work are used as examples for establishing a more holistic account of the value of Foucault's archaeological and genealogical methods of historical enquiry. They are (1) the work of German media theorist Friedrich Kittler, (2) the Stanford School of the philosophy of science, (3) cultural studies work in governmentality studies, and (4) Giorgio Agamben's application of the Foucauldian concept apparatus. After providing eight questions for orienting Foucauldian historical investigation, the chapter explains how this leads to understanding the interrelated dimensions of power, knowledge, and subjectification as they intersect with the historical establishment of media forms, institutions, and technologies.      Keywords:    Foucault,  Kittler,  Agamben,  archeology,  genealogy,  power,  knowledge,  subjectification,  media history