The attempts in the direction of Double Dome started with tomb of Taj Khan (1501 ) and the tomb of Sikandar Lodi (1518), both in Delhi. However, the fully mature form of the double dome is seen, for the first time in India in the tomb of Humayun.

What is double doming?

an intellectual; egghead.

Why was the double dome used in the Indo Islamic architecture?

The devices of double dome enable the ceiling Inside to be placed lower and In better relation to the Interior space it covers. This is done without disturbing the proportions and the effect of elevation of the exterior.