Great Mosque of Samarra  
  Built around 848-849

The Great Mosque was the Abbasid capital in central Iraq. It is one of the largest mosque taking up 240 x 160 m, and was built with baked bricks. The most famous feature is the spiral minaret, also called the Malwiyya. The minaret reach up 52 meters and may have been influenced by the earlier Mesopotamian ziggurats.