Which is the largest and most beautiful mosque in the world?
What is the most beautiful Islamic palace in the world?
Taj Mahal. Taj Mahal. ... 

The Alhambra. The Alhambra © Xavier Allard/Fotolia. ... 
The Friday Mosque, Esfahan. Friday Mosque, Esfahan © Suronin/Dreamstime.com. ... 
The Dome of the Rock. ... 
Great Mosque of Samarra. ... 
The Citadel of Aleppo. ... 
Great Mosque of Córdoba. ... 
Suleymaniye Mosque complex, Istanbul.