This building was built during the reign of Sultan Mohammad Khodabande (Uljaito) in a period of 9 years (from 704 to 712 AH). Regarding this building, many hypotheses have been expressed by historians, geographers, archaeologists and even ordinary people in terms of proportions, combinations, integrations and other features, which have two dominant aspects:
The first theory is related to the advanced historians and geographers who identified the dome building as the tomb of Sultan Muhammad Khodabande Oljaito. The second theory is related to the attribution and allocation of the building, on behalf of Uljaito, to the tombs of Ali bin Abi Talib (a.s.) and Hussein bin Ali (a.s.).
Experts have rejected the attribution of the Soltanieh dome building to the tomb of Imam Athar (a.s.) by archaeological investigations and studying architectural elements, and it has become clear that the Soltanieh tomb was built by Ghazan and Oljaito in imitation of the existing tombs in Iran.
The Soltanieh dome evokes the splendor of the Saint Mary's Cathedral in Florence, Italy and the Hagia Sophia Mosque in Turkey. This building is the third largest historical building in the world and the first large historical building in Iran. This building was the tallest building in the world at the time of its construction. Compared to similar works, the architecture of Soltanieh Dome is unique in terms of its grandeur and dimensions, and it is a unique example of a successful experiment. This building is 5.48 meters high, 25.60 meters of arch opening, 6.87 meters wide, 17.5 meters long from the outside and 8.60 meters long from the inner side. This building has 8 high balconies and nearly 50 rooms and special room-like spaces. The Soltanieh Dome is the first building that clearly shows the evolution of the architecture of the Seljuk period to the architecture of the Ilkhanid period. The weight of the huge dome and arches and other architectural elements are supported by its octagonal beams. The calculations show that the weight of the 200-ton dome is based on the joists, each of which has a cross-sectional area of ​​50 square meters. Recent studies have clarified that these elements also have hollow sections. This feature increases the resistance of bricks against earthquakes and wind pressures. Using ivory wooden beams in different dimensions and sizes is important from this point of view.

The mortar of this building is a mixture of plaster and a small amount of lime. Including the ground floor, the Soltanieh dome has three distinct layers: the ground floor contains eight porches and includes the northwest, northeast, entrance, and south porch overlooking the Torbetkhaneh. The first floor is located 9.40 meters from the current floor of the building and has communication corridors that surround the building. The last layer is placed at 27.80 meters from the floor. On this floor, there are the cupola and the octagonal bases of the minarets. The height of the basement of this floor is 1.40 meters, and the height of the roof of the last floor is 19 meters.
The entrance to the cellar is located in the south porch. The design of the cellar is very complex and includes 7 volume units that are not spatially connected to each other. This tomb building method cannot be compared with any of the known tombs in Iran. It is almost certain that the crypt was designed based on the insight and thinking of the rituals of Mongolian shamanism. Considering the philosophy and beliefs of shamanism and its emphasis on the existence of evil spirits and all kinds of magic, in order to prevent evil spirits from entering and disturbing the graves, it has been necessary to appoint guards and build places to fulfill the above purposes.
In terms of decorations, the Soltanieh dome is a display of the perfection of Iran's past architecture and the creativity of designers, architects and engineers of its time has been displayed and judged. In this building, two layers of architectural decoration and ornamentation have been identified: part of the decorations of the second layer belongs to the era of Uljaito and the beginning of the era of Sultan Abu Saeed Bahadur. The decoration of the first layer, in general, was carried out with the progress of the construction work and was finished when the doors of the Albar were opened.
The main decorative elements in the Soltanieh dome are: brick decorations, plastering, inscriptions, and tiling, all of which are arranged together with interesting coordination.
The longest inscription of this historical building is the one written at a distance of 360 cm from the floor of the dome, and 75 cm wide around the building and it continues towards the porches and porches. In this inscription, Surah "Fath" is written in the beautiful font of Thulat. Above each of the eight porches, a hadith is mentioned. At the level of the arch, on the second floor of the east porch, there are inscriptions made of lead bricks in the field of green and blue mosaic tiles. On this inscription, verse 125 of the blessed Surah "Baqarah" (Surah 1) is written in Kufic script.
On the surface of the south-east and south-west porches, decorative designs in the form of bergamot have been designed with blue color, and the general lines of these designs are slim. Next to these Islamic paintings, the words of Abu Bakr, Omar, Usman and Ali, Hassan and Hussain are continuously repeated. This dome alone is considered one of the wonders of architecture in Iran and the world and has the first-class values ​​of cosmopolitanism.
The objects displayed in this museum are:
The objects excavated from Soltanieh include types of one-part clay pots and simple plates, types of gilded tiles, cruciform, plain, mosaic, etc., copper and silver coins related to the Ilkhanid period and...
 

Coordination number (Mr. Ahmed Rahmani - Executive Director of Soltanieh Dome): 09127724606
Visiting the first six months: 9 to 19 and the second six months 8 to 17
Weekly holidays: No, and the building and museum holidays are official holidays of the country.
Ticket price: Iranian visitors: 50,000 Rials and foreign visitors: 1,000,000 Rials