Harris and Ullman's Multiple Nuclei Model

Harris and Ullman's Multiple Nuclei Model suggests that cities develop around several centers, or "nuclei," rather than just a single downtown. These nuclei can include areas focused on industry, shopping, or entertainment, each drawing specific types of activity. As the city grows, these various centers form independently and influence the location of homes, businesses, and services nearby. This model explains how modern cities often have multiple hubs of activity, reflecting diverse functions and economic activities, and helps us understand contemporary urban layouts beyond the traditional city center model.