Otto Wagner, Adolf Loos, and the Road to Modern ArchitectureContemporary architectural theory emphasizes the importance of tectonics, the term used to articulate the relationship among construction, structure, and architectural expression. Yet, little consideration has been given to the term's origins or historical significance. In this study, Oechslin examines the attempts by early Modern theoreticians of architecture to grapple with the relationship between appearance and essence. He locates the culmination