Hagia Sophia - tedder
On the sides of the arch you can see the seraphs, the one on the left has the face uncovered, the one on the right is still covered as it was during the time the Hagia Sophia was used as a mosque.

On the sides of the arch you can see the seraphs, the one on the left has the face uncovered, the one on the right is still covered as it was during the time the Hagia Sophia was used as a mosque.