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Soltaniyeh

The mausoleum of Oljaytu was constructed in 1302–12 in the city of Soltaniyeh, the capital of the Ilkhanid dynasty, which was founded by the Mongols. Situated in the province of Zanjan, Soltaniyeh is one of the outstanding examples of the achievements of Persian architecture and a key monument in the development of its Islamic architecture. The octagonal building is crowned with a 50 m tall dome covered in turquoise-blue faience and surrounded by eight slender minarets. It is the earliest existing example of the double-shelled dome in Iran. The mausoleum’s interior decoration is also outstanding and scholars such as A.U. Pope have described the building as ‘anticipating the Taj Mahal’.

Brief Synthesis

In north-western Iran’s city of Soltaniyeh, which was briefly the capital of Persia’s Ilkhanid dynasty (a branch of the Mongol dynasty) during the 14th century, stands the Mausoleum of Oljaytu, its stunning dome covered with turquoise-blue faience tiles. Constructed in 1302-12, the tomb of the eighth Ilkhanid ruler is the main feature remaining from the ancient city; today, it dominates a rural settlement surrounded by the fertile pasture of Soltaniyeh. The Mausoleum of Oljaytu is recognized as the architectural masterpiece of its period and an outstanding achievement in the development of Persian architecture, particularly in its innovative double-shelled dome and interior decoration.

The Mausoleum of Oljaytu is an essential link and key monument in the development of Islamic architecture in central and western Asia. Here, the Ilkhanids further developed ideas that had been advanced during the classical Seljuk phase (11th to early 13th centuries), during which the arts of Iran gained distinction in the Islamic world, thereby setting the stage for the Timurid period (late 14th to 15th centuries), one of the most brilliant periods in Islamic art. Particularly relevant are the mausoleum dome’s double-shell structure (an inside shell and an outside shell), and the materials and themes used in its interior decoration. The very large 50-m-high dome is the earliest extant example of its type, and became an important reference for the later development of the Islamic dome. Similarly, the extremely rich interior of the mausoleum, which includes glazed tiles, brickwork, marquetry or designs in inlaid materials, stucco, and frescoes, illustrates an important movement towards more elaborate materials and themes. The Mausoleum of Oljaytu thus speaks eloquently to the Ilkhanid period, which was characterised by innovations in structural engineering, spatial proportions, architectural forms, and decorative patterns and techniques.

Excavations carried out in the 790-ha Mausoleum of Oljaytu property have revealed additional vestiges of the old city, and a large part of this property has retained its archaeological character. As the ancient capital of the Ilkhanid dynasty, Soltaniyeh represents an exceptional testimony to the history of the 13th and 14th centuries in Iran.

Criterion (ii)The Mausoleum of Oljaytu forms an essential link in the development of the Islamic architecture in central and western Asia, from the classical Seljuk phase into the Timurid period. This is particularly relevant to the double-shell structure and the elaborate use of materials and themes in the decoration.

Criterion (iii)Soltaniyeh, as the ancient capital of the Ilkhanid dynasty, represents an exceptional testimony to the history of 13th and 14th centuries.

Criterion (iv)The Mausoleum of Oljaytu represents an outstanding achievement in the development of Persian architecture, particularly in the Ilkhanid period, characterised by its innovative engineering structure, spatial proportions, architectural forms, and the decorative patterns and techniques.

Ministry of foreign affairs,
Islamic Republic of IRAN,
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