TEHRAN -- For much of its history, Isfahan has been described through the familiar language of dynastic power, sectarian rivalry and political upheaval.
Yet beneath those transformations lay another, less conspicuous history: the history of a city in which scholars, merchants, Sufis and ordinary residents repeatedly negotiated religious difference.
To call Isfahan an uninterrupted haven of sectarian harmony would be too simple. Periods of conflict, coercion and religious discrimination certainly occurred.
But the surviving intellectual, commercial and architectural record points to something equally important: across many centuries, social and economic life frequently required Shiʿa and Sunni Muslims to coexist, exchange knowledge and share urban institutions.
In the medieval period, Isfahan was an important center of Sunni scholarship, particularly within the Shafiʿi and Hanafi traditions, while Shiʿi communities were also established in the city.
The intellectual world was more porous than later sectarian categories can suggest. Abū Nuʿaym al-Iṣfahānī (d. 1038), the celebrated Sunni hadith scholar and historian, documented the city’s scholarly culture in Dhikr Akhbār Iṣfahān.
His work forms part of a wider body of evidence for the circulation of traditions concerning the Prophet’s family across different scholarly milieus.
Another frequently cited figure requires a qualification. Abū al-Faraj al-Iṣfahānī (c. 897–c. 967), author of Maqātil al-Ṭālibiyyīn, was not a Sunni historian, as is sometimes claimed; the prevailing scholarly view identifies him with a Shiʿi, probably Zaydi, milieu. His work nevertheless illustrates the permeability of intellectual networks: it became an important source for historians across confessional boundaries.
The city’s architecture provides perhaps the clearest physical record of this layered history. The Jameh Mosque of Isfahan is not a monument belonging neatly to one dynasty or sect.
Its celebrated Seljuq domes, associated with Niẓām al-Mulk and Tājj al-Mulk, stand alongside the Ilkhanid period’s extraordinary stucco mihrab attributed to the reign of Öljaitü and later Safavid additions. Rather than erasing earlier structures, successive political and religious cultures incorporated them into a continuously evolving sacred landscape.
Between the seventh and ninth centuries AH, Sufi institutions added another layer to this urban ecology. The language of devotion to the Prophet and the Ahl al-Bayt could cross formal juridical boundaries, even when theological and political differences remained real. Isfahan therefore participated in the broader Iranian pattern in which Sufi networks, pilgrimage and scholarly exchange created spaces of interaction between communities.
The Safavid transformation fundamentally altered the religious balance. With the establishment of Twelver Shiʿism as the state religion, Isfahan eventually became the Safavid capital under Shah ʿAbbās I and the architectural showcase of a Shiʿi empire.
Yet religious homogenization was never complete. The capital remained commercially cosmopolitan, home not only to Muslims of different backgrounds but also to substantial Armenian, Indian, Jewish and other communities.
Encyclopaedia Iranica notes the significant presence of Indian merchants and moneylenders in Safavid Isfahan, illustrating the city’s role within long-distance commercial networks linking Iran with India and beyond.
European observers such as Jean Chardin and Jean-Baptiste Tavernier provide valuable, though necessarily external, evidence for the complexity of Safavid Isfahan.
Chardin, who lived in Persia for several years and spent an extended period in Isfahan, recorded detailed observations on commerce, religious institutions, urban society and minority communities.
His account is particularly useful because it reveals a capital whose economic and social life could not be reduced to its official confessional identity.
The story continued into the nineteenth and twentieth centuries, when Isfahan’s scholarly institutions participated in broader debates about Islamic reform and Muslim solidarity.
The most consequential example was Ayatollah Sayyed Hussein Borujerdi, whose later support for the rapprochement movement associated with Cairo’s Dar al-Taqrib al-Madhahib al-Islamiyya helped give Shiʿi–Sunni dialogue an international institutional dimension.
The organization was established in 1947 through the efforts of scholars from both traditions, including Muhammad-Taqi Qummi and prominent Egyptian and Shiʿi scholars; Borujerdi became one of its important supporters rather than its sole founder.
Iran’s modern observance of Unity Week, spanning 12 to 17 Rabiʿ al-Awwal in recognition of differing traditional dates for Prophet Muhammad’s birth, places that historical experience within a contemporary language of Islamic solidarity.
Isfahan’s deeper history suggests why such solidarity is most durable when it is not merely proclaimed from above, but embedded in the institutions and shared spaces of urban life.