This critical dictionary introduces approximately seventy terms from architectural theory in short, clear, and accessible essays. The entries cover contemporary concepts such as agency, Baukultur, and right-wing spaces, alongside foundational notions such as architecture, function, and space, as well as slogans such as “form follows function,” “less is more,” and “fifteen-minute city.” Each explains the history of the term, critically situating it within its theoretical context and examining its underlying ideologies. Numerous cross-references, references to further literature, and a comprehensive index make this volume an essential and engaging resource. A new standard reference work for architectural theory—suitable for students and architects Provides foundational knowledge for critically evaluating architectural discourse Marks the first volume after the redesign of the architektur + analyse series