The Quba Mosque (Quba' Masjid or Masjid al-Quba) just outside Medina, Saudi Arabia, is the first Islamic mosque that was ever built. Its first stones were positioned by the prophet Muhammad on hijrah (journey) from the city of Mecca ("Makkah") to Medina and the masjid was completed by his companions.

It is this mosque that is called the Masjid al-Taqwa in the Qur'an:

"There is a mosque whose foundation was laid from the first day on piety; it is more worthy of thy standing forth (for prayer) therein. In it are men who love to be purified; and Allah loveth those who make themselves pure" (Sura 9:108).