Islamically all Non-Muslims are allowed to visit the holy places of Islam. I don't know why they have banned but nobody object if Non-Muslim visits the Mosques. If i am not wrong the Mosque in Madina at one stage was like the parliament of today
- All decisions used to be taken place from there. Even non-Muslims used to enter the Mosque of the Prophet and be presented before the Caliph. There is a place in the Mosque that has been reserved for the caravans coming from outside Madina. That is very close to the grave of the Prophet and now is used by the Muslims only.