The introduction of Invisible Fatherland lays the historiographical and conceptual groundwork for the book’s empirical chapters. The literature review traces the shift in Weimar studies from teleological narratives of inevitable collapse to a more balanced view of the first German democracy. Drawing on Jan-Werner Müller and Jürgen Habermas, the author clarifies the concept of constitutional patriotism by distinguishing it from civic and ethnic nationalism. She critiques the homogenizing tendencies of Weimar political thought, particularly Rudolf Smend’s influential theory of symbolic integration, for limiting our understanding of the republic’s original and innovative political culture. Finally, the introduction engages the work of scholars such as David Kertzer, Michael Walzer, and William Reddy to prepare for an empirical study of the republic’s symbolic style and emotional tone. Altogether, the introduction establishes an analytical framework for recovering Weimar’s constitutional patriotism and its relevance to contemporary debates on democratic resilience.