El Jadida, also known as Mazagan, is a port city on the Atlantic coast of Morocco. It was founded by Portuguese in the 16th Century AD as a fortified colony on the Atlantic coast, and then came under Moroccan control in the late 18h century. The city presents an outstanding example of the exchange of cultural influences between Europe and Morocco, and this is evidenced by city planning and architecture. The city includes a group of historical monuments and buildings such as the walls and fortifications, the port and the Portuguese Cistern, the Portuguese church and the Great Mosque. The Portuguese Fortified City of Mazagan was inscribed as a UNESCO World Heritage Site in 2004.