The Pahlavi era in Iran coincided with the emergence of various movements that influenced different aspects of people’s lives, providing fertile ground for the expression of architects’ creativity and talent. Along with these developments, the physical structure of cities underwent significant transformations. Among them, changes in the function of urban passages led to a shift in architectural character—from introversion to extroversion. Consequently, openings and windows acquired a more prominent role in shaping the urban façade and landscape.
In contemporary Iranian architecture, however, this valuable heritage has been endangered in recent years due to rapid demolitions and renovations carried out without regard for the existing historical structures.
The purpose of this article is to analyze the typology and identify the archetypal patterns underlying the formation of window forms. The research method is descriptive-analytical, and the approach is qualitative. This study aims to answer two main questions:
1. Into how many categories can the dominant formal patterns of openings in Tehran’s Pahlavi-period architecture be classified?
2. What are the origins of each of these dominant formal patterns?
To achieve this, approximately 1,000 houses were analyzed. Patterns with formal similarities were identified and categorized into several groups: pure patterns, shape patterns, free spiral, ram’s horn spiral, single spiral, regular spiral, composite spiral patterns, composite patterns, floral and vegetal motifs, and forty-piece compositions. Based on these general classifications, a fundamental pattern was extracted for each category.