Emergence and Structure of Urban Centralities in a Medium-Sized Historic City

Abstract

Within the last 20 years, medium-sized cities in Portugal’s interior have been subject to a process of “desertification.” They have progressively lost in terms of economic activity, value and vitality, with the corresponding erosion of their heritage value. One exception to this general trend is the town of Évora. Of particular note is the vitality of its historic center (designated as a World Heritage Site in 1986) and the balance achieved between the center and a number of subcenters outside the walls. Here, urban centralities have proven to be an essential component of the urban structure in the fight against urban failure. This research project analyzes the relationship between town planning and the emergence of urban centralities. Historic towns are a very particular case, with subcenters emerging as a town grows and the historic center co-evolving with the entire urban area and surrounding urban centralities. The rise of centralities testifies to the vitality of the town. This article seeks to understand what factors have led to the balance of urban centralities in Évora by examining their structure and how they have emerged in the context of planning policies and urban growth. The methodology adopted crosses the results of three different approaches to highlight the emergence of urban centralities: identification and assessment of urban centralities, analysis of urban areas based on a space syntax approach, and the study of urban planning and management policies focused on centralities. The results help to characterize urban centralities that coexist with a strong historic center.