Na'in
Iran
Na'in is a town in central Iran located approximately 140 km east of Isfahan, at the edge of the central Iranian desert. Occupation may pre-date the rise of Islam, but the foundation date is not known. The Great Mosque of Na'in is of substantial antiquity and is the city's most famous landmark. 

Sources:

C. E. Bosworth, "Nā'īn," Encyclopaedia of Islam, Second Edition. http://dx.doi.org/10.1163/1573-3912_islam_SIM_5764 [Accessed September 24, 2018].
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Variant Names
نائين
Original
نايين
Alternate