Is the location of the grave of 'Ali ibn Abi Talib and al-Husayn ibn 'Ali established?

Question:
Honorable Shaykh, may Allah grant you success, is the location of the grave of 'Ali ibn Abi Talib established? Also, we hear that there is a grave of al-Husayn ibn 'Ali in Iraq and in Egypt, so how do you reconcile these?

Answer:
'Ali ibn Abi Talib (may Allah be pleased with him) was buried in the Governor's Palace in Kufah. This is a well-known fact; it is the place where he was killed and where he was martyred (may Allah be pleased with him). Al-Husayn was killed in Karbala and buried in Karbala. They say that his head was transferred to Sham to be displayed to the Umayyad caliph.
However, it is not established where the head was buried, and it appears that it was buried in Sham. As for it being in Egypt, that is a mistake. The Shaykh al-Islam has a treatise titled "The Head of al-Husayn" that clarifies this matter, stating that al-Husayn's head did not go to Egypt because the caliph was in Sham, not in Egypt. Rather, this is a myth and a lie. Yes.