The curious orientation of the Grand Mosque in Cordoba has troubled investigators for almost a century. Now, thanks to archaeological work in the suburb of Roman Corduba named Colonia Patricia, it is clear that the Mosque is aligned with the former orthogonal street-plan of the suburb. Further, thanks to the discovery over the past few decades of an entire corpus of manuscripts relating to the
... [Show full abstract] sacred geography of Islam and the determination of the qibla by means of astronomical horizon phenomena, it is clear that the qibla-axis of the Mosque is parallel to the main axis of the astronomically-aligned rectangular base of the Kaaba in Mecca. This corresponds to what is related in the texts on sacred geography: the qibla of al-Andalus is the direction one faces when standing in front of the NW wall of the Kaaba. This is not the direction for the qibla advocated by Andalusî scientists, but that is another matter.