This document summarizes a presentation on comparing public spheres. It discusses different models of public spheres, challenges in comparing public spheres across countries, and findings from analyses of several issues in European public spheres. Key findings include that debates are often framed in national rather than European terms, there are both pan-European and nationally-focused public spheres, and media play both dependent and independent roles in shaping public debates. The document outlines areas for further research on the rise of populism and roles of traditional and new media.