Zanjan
Soltaniyeh
The lost Mongol capital crowned by the world's oldest double-shell dome.
6 highlights · tap a pinSoltaniyeh is a small town on the high plain of Zanjan province that was, for a few decades in the early 14th century, the dazzling capital of the Mongol Ilkhanid empire. Its defining monument is the Dome of Soltaniyeh, the mausoleum of Sultan Oljaytu (Muhammad Khodabandeh), an octagonal brick colossus whose turquoise-faience dome rises about 50 m and is the earliest existing double-shelled dome in Iran and one of the largest brick domes in the world. The UNESCO-listed monument bridges Seljuk and Timurid architecture and influenced later masterpieces from Samarkand to the Taj Mahal. Today the grand city Oljaytu dreamed of survives mainly as ruins and scattered Ilkhanid monuments around the towering dome.
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Top places to see
- 1
Dome of Soltaniyeh (Mausoleum of Oljaytu)
UNESCO 2005Towering octagonal brick mausoleum with a turquoise double-shell dome, the centerpiece of the UNESCO site. The earliest existing double-shelled dome in Iran and one of the largest brick domes in the world (~25 m diameter, ~50 m high), ringed by eight minarets. A pivotal monument linking Seljuk and Timurid architecture, with interior brickwork, stucco, faience and murals; widely cited as an influence on later domes including Florence's cathedral debate and the Taj Mahal lineage.
- 2
Chalabioghlou Mausoleum
Octagonal Ilkhanid-era tomb tower and Sufi monument just southwest of the great dome. A historic octagonal mausoleum linked to the mystic Sheikh Barragh Baba, exemplifying Azeri-style tomb-tower architecture of the Ilkhanid period; one of the best-preserved secondary monuments of the old capital.
- 3
Dash Kasan (Dragon Temple)
Rock-cut Ilkhanid temple complex carved with large dragon reliefs, southeast of town. A three-cave complex commissioned under Oljaytu and reportedly worked by Chinese craftsmen, with sprawling carved dragons that fuse Mongol, Chinese and Islamic motifs - a rare physical trace of the Ilkhanids' east-west cultural exchange.
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Friday Mosque of Soltaniyeh
Remains of the congregational mosque built under Oljaytu in the old capital. An Ilkhanid-era mosque attributed to Oljaytu's building program, part of the historic urban fabric of the vanished capital.
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Ruins of the Ilkhanid city walls and citadel
Earthwork and archaeological remains of Oljaytu's planned capital around the dome. Scattered remnants of the once-vast imperial city and its fortifications give a sense of the scale Oljaytu intended; the wider archaeological zone is part of the UNESCO buffer.
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Day trip to Zanjan city (bazaar and Rakhtshuykhaneh)
Provincial capital ~35 km away with a covered bazaar and the Rakhtshuykhaneh (Laundry House) Anthropology Museum. Pairs naturally with Soltaniyeh; Zanjan's historic Qajar-era covered bazaar and the unusual Rakhtshuykhaneh public-laundry-turned-museum showcase regional craft and daily life, plus knife and filigree workshops.