Inside Humayun's tomb - illuminated by light from heaven

The graves kept inside Hymayun's tomb are illuminated by light from heaven which enters the room through this specially designed windows. A woman standing in front of the window for a photo shot.
God is the Light of the heavens and the Earth.
The parable of His Light is as if there were a niche.
and within it a lamp: the lamp enclosed in glass: the glass a brilliant star,
lit from a blessed tree, an olive neither of the East nor the West,
whose oil is luminous though fire scarce touched it.
Light upon Light! God doth guide whom
He will to his Light
- The Holy Quran, Chapter 24, Verse 35

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