Answer: 4.The light of God
Step-by-step explanation:
The Hagia Sophia is one of the most famous places of worship in the world having served Christians and now Muslims. It was originally built as a church under Justinian 1 but became a mosque after the Ottomans conquered the Byzantine empire.
It then became a museum and then a mosque.
The Hagia Sophia was built in such a way that it draws it a huge amount of light which is believed to be the light of God