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 Segeju and went home. This stimulated the Portuguese to take over Mombasa a third time in 1589, and four years later they built Fort Jesus to administer the region. Between Lake Malawi and the Zambezi mouth, Kalonga Mzura made an alliance with the Portuguese in 1608 and fielded 4,000 warriors to help defeat their rival Zimba, who were led by chief Lundi. After the building of Fort Jesus Mombasa was put by the Portuguese under the rule of members of the ruling family of Malindi. In 1631 Dom Jeronimo the ruler of Mombasa slaughtered the Portuguese garrison in the city