I thought it will be cool use alternative leaders for show differents aspects of any civilization. In this case, Spains becomes Al-Andalus under Al-Manṣūr with Cordoba as capital.

UA: Medina Alzahira War weariness when fighting different religion civ halved. Second religion in a city provides +5% culture bonus, third religion in a city provides +5% science bonus.

What do you think?