This enormous spiral tower is part of the Great Mosque of Samarra. It stands 165 ft. tall and it would have been the first thing a traveler or enemy would have seen when approaching Samarra. It acts as a minaret to the mosque but it is not functional, so it is instead marking the presence of the Caliph and is a symbol of power.
The tower is composed of perfect mathematical spirals. Many structures in were built using a precise mathematical system or pattern like the one that was used to build the Malwiya.