The spiraling 9th-century monument that once held the title of world's largest mosque

Countries & Cities · Published 12 October 2026 · Updated 25 October 2026 Swipe more like this →

In short: In the mid-800s, the Abbasid caliph Al-Mutawakkil commissioned a structure of unprecedented scale. Featuring a 52-metre sandstone minaret with a unique spiral ramp, the Great Mosque of Samarra was designed to be a massive visual statement of Islamic presence in the Tigris Valley.

Completed around 851 CE, the Great Mosque of Samarra was a feat of imperial engineering. The project, which included up to twenty palaces, cost between 258 and 294 million dirhams. The mosque's construction utilized baked brick octagon piers and imported marble columns, reflecting Al-Mutawakkil's practice of hiring architects and artists from across the Abbasid empire. At its peak, the mosque covered 165,886 square metres, capable of accommodating over 60,000 worshippers. The mosque's interior was highly decorative, featuring seventeen aisles and walls adorned with dark blue glass mosaics. The structure was also supported by 464 pillars, which held up a baked brick ceiling at a height of 11 meters.

The mosque's most iconic feature, the Al-Malwiya Tower, is a 52-metre-high conical minaret. Its design is a subject of architectural debate: while some suggest its spiral shape was inspired by ancient Mesopotamian ziggurats, modern scholars like Richard Ettinghausen, Oleg Grabar, and Jonathan Bloom have challenged and rejected this theory. The structure's influence extended far beyond Iraq, inspiring the 1976 Chapel of Thanksgiving in Dallas, Texas, and the Sheikh Khalifa mosque in Al Ain. The base of the tower is 33 metres wide and is constructed from sandstone. This unique design was later replicated by the caliph Abu Dulaf for his own mosque in the same city.

The site has endured significant destruction. The mosque was largely ruined during the Mongol invasion of Iraq by Hulagu Khan in 1258/12mnopqrst 1259 CE. More recently, the minaret's top was destroyed by an explosion in 2005. Despite these setbacks, the site remains a UNESCO World Heritage Site, recognized since 2007, with ongoing restoration efforts by the Iraqi State Organization of Antiquities to preserve its remaining outer walls and spiral ramp. The outer wall of the mosque is reinforced by forty-four semi-circular towers and contains twenty-eight windows. The courtyard itself was rectangular and featured a central fountain decorated with marble tile and mosaics.

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