Comparative Analysis of the Evolution of the Nakhchivan–Tabriz Architectural System

This preprint offers a comparative analysis of the Nakhchivan and Tabriz architectural schools within the broader context of medieval architecture. It examines their geometric structures, structural systems, and decorative languages through a four-dimensional analytical model (geometric, structural, decorative, and conceptual). The study highlights how the Nakhchivan school established the geometric–structural core of the region’s tradition, while the Tabriz school expanded this foundation with greater spatial complexity and advanced mosaic tilework. The findings suggest that these two schools represent interconnected phases of a shared architectural system whose evolution is overlapping, interdependent, and nonlinear.