Over the next two centuries, Cairo became a center of culture and learning that was unsurpassed in the Islamic world with the establishment of the renowned El-Azhar University and mosque.
Cairo became a center of culture and learning in the Islamic world surpassed only by the city of Alexandria. 
mnli hypothesis: Cairo became a center of culture and learning in the Islamic world surpassed only by the city of Alexandria.  premise: Over the next two centuries, Cairo became a center of culture and learning that was unsurpassed in the Islamic world with the establishment of the renowned El-Azhar University and mosque.