The Architecture, Criticism, History and Theory (ACHT) laboratory at EPFL delves into the intricate relationship between architectural theory, criticism, and history. Through a blend of historical research, critical judgment, and theoretical speculation, the lab explores the evolution of architectural ideas, societal implications, and the impact of historical context on architectural choices. A focal point is the examination of significant architectural writers of the twentieth century, emphasizing the value of texts as sources of knowledge. Additionally, ACHT conducts micro-historical inquiries into pivotal architectural projects, such as those by Rem Koolhaas' Office for Metropolitan Architecture in 1989, to understand the theoretical and critical evolution of contemporary Western architecture.