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Mehdya (Arabic: المهدية, romanized: al-Mahdiyā), also Mehdia or Mehedya, is a town in Kénitra Province, Rabat-Salé-Kénitra, Morocco. Previously called al-Ma'mura, it was known as São João da Mamora under 16th century Portuguese occupation, or as La Mamora under 17th century Spanish occupation.
Mehdya was previously called Al-Ma'mura ("the well-populated") or La Mamora in Europe, and was a harbour on the coast of Morocco. Per an ancient account, a colony was founded at the site in the 5th century BCE by the Carthaginians, who called it Thymiaterium.
It was captured by the Portuguese in 1515, and renamed São João da Mamora. Altogether, the Portuguese are documented to have seized 6 Moroccan towns, and built 6 stand-alone fortresses on the Moroccan Atlantic coast, between the river Loukos in the north and the river of Sous in the south. Four of the stand-alone fortresses only had a short duration: Graciosa (1489), Forte de São João de Mamora (pt) (1515), Castelo Real of Mogador (1506–10) and Aguz (1520–25). Two of them were to become permanent urban settlements: Santa Cruz do Cabo de Gué (Agadir, founded in 1505-06), and Mazagan founded in 1514-17. The Portuguese had to abandon most of their settlements between 1541 and 1550, although they were able to keep Ceuta, Tangier and Mazagan.
Mehdya, known as La Mamora, was under Spanish rule between 1614 and 1681. After capturing Larache in 1610, the Spanish then captured Al-Ma'mura during the reign of Mulay Zidan in August 1614, due to the period of anarchy that followed the death of Mulay al-Mansur in 1603. After negotiations with Mulay Zidan, they left a strong garrison of 1,500 men, and called the harbour San Miguel de Ultramar.
The warlord Sidi al-Ayachi led a counter-offensive against Spain, privateering against its shipping, and obtaining the help of the Moriscos and the English. About 1627, he managed to temporarily capture Al-Ma'mura, and add it to his Republic of Salé.
The Spanish retained the city for 67 years, when it was conquered by the Alaouite ruler Moulay Ismaïl. According to tradition, the Bishop of Cadiz had commissioned a statue of Jesus Christ for the church at La Mamora, which was in his diocese. When the Moroccans reoccupied the town in 1681 they took the statue as loot, and later received a ransom from the Spanish for the return of the statue, which was taken to Madrid where it is nowadays venerated under the name of Cristo de Medinaceli.
In 1795, Mulay Slimane closed the harbour of Mehdya to avoid foreign incursions.
The French occupied Mehdya in 1911.
About 9,000 Allied troops, carried by 19 warships, were landed in Mehdya during Operation Torch in 1942.