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Medina, also transliterated as Madīnah, is a city in the Hejazi region of the Arabian Peninsula and administrative headquarters of the Al-Madinah Region of Saudi Arabia. At the city's heart is al-Masjid an-Nabawi ('The Prophet's Mosque'), which is the burial place of the Islamic prophet, Muhammad, and it is one of two holiest cities in Islam, the other being Mecca.
Over the centuries Masjid an-Nabawi has under gone various expansions and reconstructions. After an expansion during the reign of the Umayyad caliph al-Walid I, it now incorporates the final resting place of Muhammad and the first two Rashidun caliphs Abu Bakr and Umar.