Qutb al-Din al-Shirazi's planetary model, from his 1284 CE publication Al-Tuhfat al-Shahiya (The Royal Present).
Digital source: Kennedy, E. S. - Late Medieval Planetary Theory, Isis, Vol. 57, No. 3. (Autumn, 1966), pp. 365-378., The University of Chicago Press. Accessed online from JSTOR (access to affiliated users only).
Original source: fol. 62v of Aya Sofya MS 2584, Suleymanie Library, Istanbul.
== Summary == Qutb al-Din al-Shirazi's planetary model, from his 1284 CE publication ''Al-Tuhfat al-Shahiya'' (''The Royal Present''). '''Digital source:''' Kennedy, E. S. - Late Medieval Planetary Theory, Isis, Vol. 57, No