Known as Arzachel to the western world, Ibrahim al-Zarqali was a leading Muslim astronomer who left an indelible mark on the global stage. One of the craters on the Moon carries his name. He built a water clock, perfected the astrolabe, and corrected Ptolemy and al-Khwarizmi's geographical data. Copernicus also made mention of al-Zarqali while explaining his heliocentric theory. He was also regarded as one of the leading numerologists of his time.

Speakers:

• Dr. Emilia Calvo Labarta, Faculty of Philology, University of Barcelona
• Dr. Rosa Comes, Faculty of Philology, University of Barcelona

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