Join Rich from Roam Around Tours on a Walking Tour of the Columbus Circle Historic District in Janesville. The Columbus Circle Historic District is a charming and compact neighborhood of modest sized homes in various styles popular between the 1920s to the 1940s. This was an era that home designs changed many revival styles that referenced past eras of history became popular. On this tour, you will see homes that resemble French chateau, English cottages, Spanish haciendas and colonial American houses.