The "Circle of Two" in Belgrade is an area of the city defined by the circular route of the tram No. 2. This space, enriched with commercial, cultural, historical, political, and geographical elements, promotes the informal centre of Belgrade. Long-term urban planning is a complex process that necessitates the involvement of multidisciplinary teams, including urban planners, architects, sociologists, energy specialists, traffic engineers, ecologists, and others. Straying from validated plans or implementing ad hoc solutions regardless of the initiator can result in the disintegration, degradation, and disorientation of urban spaces.This paper does not focus on the aspects related to the aforementioned qualified specialists. Considering the significant current and anticipated changes in both the narrow and broader centre of Belgrade, the primary aim of this paper is to document today's spatial determinants along the line of the “Circle of Two.”