Samarra.

The Spiral Minaret of Samarra was originally connected to the mosque by a bridge. The minaret or tower was constructed in 848–852 of sandstone and is unique among other minarets because of its ascending spiral conical design. Being 52 meters (171 ft) high and 33 meters (108 ft) wide at the base, the spiral contains stairs reaching to the top.

This design will also be available on my RedBubble page. Any feedback is appreciated, as I am still learning something new every day.