The Recognition and Analysis of Different Periods of Construction of Imāmzādeh Ja‘far in Boroujerd

The history of architecture in Lorestan remains shrouded in ambiguity. This uncertainty likely stems from the lack of comprehensive and targeted studies on its architectural heritage. The Ourchin dome of Imamzadeh Ja‘far, located in the cold region of Borujard, possesses   architectural characteristics typically found in the warm and rainy regions of southwestern Iran. Both architectural evidence and inscriptions suggest numerous interventions in the building across different periods. Therefore, studying this architectural monument in depth is crucial. With this objective and the assumption of a Seljuk period foundation, efforts were made to investigate the early period, construction stages, and pattern of the Imamzadeh Ja‘far tomb’s Ourchin dome. Through an examination of the architectural structure, archaeological excavations, inscriptions, and comparative analyses with similar structures, the research aimed to re-evaluate the building’s structural changes and identify its construction periods using a descriptive/analytical methodology. Key questions addressed  included the tomb's basic plan and structure, construction timeframe, and the nature of its Ourchin dome design.
The research concluded that the main building originated as a Seljuk-era tomb tower with an octagonal plan. Subsequently, during the Ilkhanid period, the structure was reinforced with the addition of buttress. Interestingly, the dome pattern drew inspiration from the cypress-shaped Ourchin domes prevalent in southwestern Iran.