Persian, this is Persian architecture.

شرق‌زده sharghzadeh This is in Cordoba. 👇🏼 also Persian ?

El Errante No. These are a different structure.

شرق‌زده sharghzadeh So which architecture they are ? If Amir Timur’s Tomb is Persian Architecture and not Islamic.

Are the above examples of Arab or Spanish architecture ?

By the same logic they are clearly not Islamic per se. Right ?

El Errante شرق‌زده sharghzadeh The mosque of Cordoba is Moorish architecture

Ali شرق‌زده sharghzadeh Muqarnas dome in the Sala de Dos Hermanas at the Alhambra in Granada, Spain (14th century)

Here is Muqarnah pattern is Alhambra.
So is this Persian then ?

El Errante Ali شرق‌زده sharghzadeh These structures (domed Muqarnas and Honeycomb Muqarnas) is an Islamicate synthesis.
There’s no strong case academically for its synthesis in one cultural region within the islamicate. Early examples are found from Spain and North Africa, Egypt & Persia all around the same period

L. Soliman El Errante Ali شرق‌زده sharghzadeh 'Muqarnas domes and cornices represent a unique element in Islamic architecture' - In case anyone would like further reading, I would highly recommend:

link.springer.com/article/10.100…