If you want a pattern with Cordoba, Byzantium is the answer.

10th century: Golden age for both (Caliphate/Macedonians)

11th century: Big crisis (Fitna/Manzikert)

12th century: Partial recovery (Almoravits&Almohades/Komnenians)

13th century: Bigger crisis (Navas of Tolosa and New Taifas/4th crusade and Frankocratia)

14th century: Survival despite the odds (Granada/Palaiologos)

15th century: Final fall (Fall of Granada/fall of Constantinople)