1911 Encyclopedia Britannica
ABD-AR-RAHMAN (822-852) was one of the weaker of the Spanish Omayyads. He was a prince with a taste for music and literature, whose reign was a time of confusion. It is chiefly memorable for having included the story of the "Martyrs of Cordova," one of the most remarkable passages in the religious history of the middle ages.
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Chisholm, Hugh, General Editor. Entry for 'Abd-Ar-Rahman II'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/a/abd-ar-rahman-ii.html. 1910.