Drawing on experiences of researching India's architectural history, this article explores the affect generated by architectural archives as a source of knowledge. It traces the affective life of the archives and practices of a singular historical figure: Otto Koenigsberger, the chief architect and town planner of the princely state Mysore, the architect of Jamshedpur (a.k.a. Tatanagar, the “Steel City,” India's first planned industrial town), the first director of housing of the federal government of India, cofounder and director of the Department of Tropical Studies of the Architectural Association in London, and architecture and planning consultant at-large to the United Nations. Arguing that the affective archive has disruptive historiographical potential, the article posits that it exists fundamentally beyond the architectural object and archival documents themselves, and indeed fully in discourse with its users. The article argues for a more expansive and inclusive understanding of what constitutes an archive, designating the “archival habitat” as a place of active scholarly engagement.