Mombasa suburb on the mainland which contains a beach, oil refineries, housing estates etc. Moi International Airport and the Port Reitz District Hospital are in Port Reitz. Mombasa is also a county and divided into six constituencies and thirty wards. Mombasa is a major trade centre and home to Kenya's only large seaport, the Kilindini Harbour. "Kilindini" is an old Swahili term meaning "deep". The port is so-called because the channel is naturally very deep. Kilindini Harbor is an example of a natural geographic phenomenon called a ria, formed at the end of the last glacial period when the sea level
Mombasa was renamed as Mvita (in Swahili) or Manbasa (Arabic). Portugal attacked the city again in 1528. In 1585 a joint military expedition between the Somalis of Ajuran Empire and the Turks of Ottoman Empire led by Emir 'Ali Bey successfully liberated Mombasa and other coastal cities in Southeast Africa from the Portuguese colonizers. The Portuguese landlords; only Malindi remained loyal to Portugal. The Zimba overcame the towns of Sena and Tete on the Zambezi, and in 1587 they took Kilwa, killing 3,000 people. At Mombasa the Zimba slaughtered the Muslim inhabitants, but they were halted at Malindi by the Bantu-speaking