Assertion: spiral minaret | /r/HasProperty | commissioned by abbasid caliph al-mutawakkil
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text: Officially known as the Malwiya or the Snail shell minaret, the Spiral minaret in Iraq was the main attractive part of the Great Mosque of Samarra, commissioned by Abbasid caliph Al-Mutawakkil, who reigned in Samarra from 847 to 861.