What is the answer to those who cite the existence of a dome over the grave of the Prophet (peace and blessings be upon him) as evidence for the permissibility of building domes over graves?

Question:
May Allah reward you, Honorable Shaykh. This questioner asks: What is the ruling on the dome that is over the grave of the Prophet (peace and blessings be upon him)? Because some people use it as an argument for the permissibility of building domes over graves?

Answer:
The grave of the Prophet (peace and blessings be upon him) was in a house, in a room, and the room had a roof. Whether the roof was a dome or made of wood, it is all the same, because this is the house of the Messenger (peace and blessings be upon him). But as for building over graves and placing domes on them, this is forbidden. Even if you do not place a dome on them, building over graves is forbidden. It is not a matter of the dome; the matter is building over the grave. That is what is forbidden, and the dome is part of the building. Yes.