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 Front: Abu Ali Hasan Ibn al-Haitham (known as Alhazen to medieval scholars in the West), born in  Basrah in 965 A.D. His most important work - although he wrote some 200 books - is held to be a seven volume series in optics Kitab al-Manazir, in which he gives the first correct explanation of vision, showing that light is reflected from an object into the eye. He is said to have ‘invented’ the camera obscura.

Back: Hadba Minaret, at the Great Nurid Mosque, Mosul, built 1172 A.D by Nurridin Zangi, the then Turkish ruler. The 59m-high minaret leans 8 feet off the perpendicular. That is how it earned its Arabic name Al-Hadba (‘the humped’).