ABSTRACT
Achaemenid architecture is symmetrical, and buildings are often detached. The most common and dominant form in this architecture is the square, which is found in almost all the buildings of Persepolis. The main architectural elements of Persepolitan buildings include the central square hypostyle hall, secondary square or rectangular hypostyle hall, portico, podium and monumental stairway. Based on functional hierarchy and needs, there are architectural elements that reflect a precise plan and a specific character. From a morphological point of view, there are two main types of internal spaces, i.e., with or without columns. The initial form of the early type of the square hypostyle hall seems to have been closed on three sides with columns on the fourth side. L. Trumpelmann analyzes various construction details, especially the dimensions of the columns of the Apadana, and proposes a cubit of 52.065cm long, recalling that it is necessary to understand proportions of the building. Buildings were obviously built using simple proportions.
