 Complete the following phrase:  Originally a Roman port called Portus Divinus, Mers-el-Kébir became an Almohad naval arsenal in the 12th century, fell under the rulers of the Kingdom of Tlemcen in the 15th century, and eventually became a center of pirate activity around 1492. It was occupied variously by the Ottoman Turks, Portuguese and Spanish, with the Spanish who named it Mazalquivir 