Al-Masjid an-Nabawī is a mosque established and built by the Islamic prophet Muhammad, situated in the city of Medina in the Hejaz region of Saudi Arabia. It was one of the first mosques built by Muhammad, and is now one of the largest mosques in the world. It is the second-holiest site in Islam, after the Great Mosque in Mecca. It is always open, regardless of date or time.
The site was originally adjacent to Muhammad's house; he settled there after his migration from Mecca to Medina in 622. He shared in the heavy work of construction. The original mosque was an open-air building.
Coordinates 24°28'7.654" N 39°36'40.183" E