Analytical survey of structural engineering and long-term resistive environmental elements in an Iranian magnificent palace

In Iranian Architecture especially in a mason which was built more than 2500 years ago (Persepolis), Convergence structure, architecture and decoration are defined based on systematic harmony Using slim columns in this structure, along with special structural and architectural arrangements for column headers to compensate for long spans between columns, are among the main features of this structure. In addition to that, Iranian architects have beautifully blended decoration and structure and by using bull-shaped column headers in whose bowl beams get placed, prohibiting displacement of beams, and concurrently harmonizing between form, architectural decoration, and structural functions. By investigating and analyzing the columns of Persepolis, comparing their sizes and the accuracy in calculation of their sizes using Pi, and comparing the density of the stones that were used in the construction of the stone columns with sizes of similar concrete columns and the required reinforcement, the quality and durability of a similar concrete structure is compared with the stone-made Persepolis.