Some Reflections on the Institutions of Muslim Spain: Unity in
... Over the centuries, the capital city of Córdoba experienced a population increase. It has been calculated that it rose from approximately
25,000 inhabitants during the time of `Abd al-Rahman I (756-788), to
75,000 during that of `Abd al-Rahman II (822-852), and to 100,000 (or
more likely to 90,000) ...