This document discusses the rise in popularity and commercialization of college football in the United States during the 1920s, known as the "Golden Age." It describes how football stadiums grew rapidly in size during this period, driven by increasing attendance, alumni donations, and competition between universities. New permanent concrete stadiums were built that could hold tens of thousands of fans, with their designs often based on the Yale Bowl stadium. This nationwide construction boom demonstrated that college football had become a major spectator sport and permanent fixture of American culture and universities.