The Great Mosque of Paris was built in the 1920s in a style variously described as Neo-Mudéjar, Islamic-Byzantine Revival, and Hispano-Moresque. It's a style in the register of some of the Islamic(ate) architecture in Spain and North Africa.
The article of faith graffitied on a wall in pencil:
The memorial to French Muslims who died in wars fighting for France:
One room off to the side was particularly interesting to me because we often talk about how medieval buildings like the Alhambra would have had fabric hangings adorning the blank plaster spaces on the walls, and here was a real-life, contemporary example. These textiles do not really seem to be trying as hard as the rest of the building to imitate Spanish and North African architecture, but it's still instructive to see the space: