Built and occupied first by the Portuguese, Fort Jesus, Mombasa, changed hands many times throughout its history, coming under Arab, Swahili and English control. Criterion (iv): Fort Jesus, Mombasa, eminently exemplifies a new type of fortification that resulted from the innovations in military and weapons technology that occurred between the 15th and 16th centuries. IntegrityThe boundaries of the property have been delineated to include the underwater archaeological remains in the expanse of sea in front of Fort Jesus as well as the moat area adjacent to Mombasa Old Town. Mombasa Old Town, which is integral to Fort Jesus’ historic context, acts as the buffer zone of the Fort. AuthenticityIn regard to authenticity, Fort Jesus, Mombasa, hasretained its form, design and materials, with coral stone and lime mortar still being used in the traditional way, where necessary, for repair and conservation work.