The Monastery of Saint Stepanos, in Julfa, is located in northwesternIran, in the province of East Azerbaijan. Whilst the exactdate of construction is unknown, the building displays exceptionalarchitecture. It is believed that the monastery was built between thetenth and seventeenth centuries, and this doubt emphasises the needto investigate the nature of structure and decoration. The Monasteryis situated in a deep canyon beside the Araxes river, on the Iranianside of the border between Iran and the Nakhichevan AutonomousRepublic in Azerbaijan. It was originally built in the ninth century,and was rebuilt during the Safavid era after being damaged by warsand earthquakes. Considering that scholars and travel writers, such asthe French Traveller Taurine, consider the construction of this buildingto be from the Safavid period, probing the structural and decorativesimilarities of this building with Safavid period architecture can bea way of dating this outstanding historical monument. During theSafavid period, the Portuguese arrival on the island of Hormuz inthe Persian Gulf (1515–1622 AD) prepared the ground for the arrivaland activity of European Christians, who spread Christianity and itsculture. One of the earliest consequences of this was the constructionof the Monastery and other Christian architecture. The basic objectivesof the article are to study the influence of Portuguese Christianarchitecture on the construction of Saint Stepanos Monastery, and toinvestigate the influence of Safavid structural design on its architecture.The main questions, are what influence has the architecture of SaintStepanos Monastery had on Christian architecture in Portugal,and what influence did the architecture the Monastery have on thearchitecture of the Safavid period?This research for this article is descriptive and analytical based onhistorical information, available documents and existing images. Anexamination of the architectural similarities between Saint Stepanos
 Monastery in Julfa and Christian architecture in Portugal is essentialfor a more accurate understanding of the Monastery.