The said lies south west of the Cohan Dej (Royal citadel). It was constructed during the reign of Soltan Mohammad Khoda Bandeh (Oljaito) in the years 704-712 AH. This structure has 8 elevated porticos and about 50 chambers, including an area which is also similar to a chamber.
The dome of this construction weighs 200 tons and is situated on pillars, bearing an area of 50 sq.m. each if separated or cut across. This structure is made of a mixture of gypsum and to a lesser proportion limestone. Gonbad Soltanieh is erected in three floors which are defined as follows. The ground floor consists of the eight portions.
The first floor comprises of the halls which run throughout this floor.On the third floor is the foundation column of the dome and the octagonal pillars supporting the minarets. The entrance to the cellar is from the southern portico. The layout or plan of this cellar is a complex one, consisting of 7 segregated sections, each part independent of the other. The principle factors regarding the artistic effects revealed in Gonbad Soltanieh are the inlayed brick-work, plaster moldings, engravings and tile works. All these together create harmony that is worth appreciation and artistic value.
For example, the spectacular engraving here that stands 360 cm. high in which a verse from the Holy Qoran (Sureh Fath) has been inscribed in the beautiful script of ‘tholth’.On the upper or second floor of this structure engravings can also be observed, one of these inscribed with the (Ayeh 125 Sureh Mobarakeh Baqareh) from the Holy Qoran inscribed in the “Kufic’ script.