Port Louis is the main port and capital city of Mauritius. It is situated on the north west of the island between a well-sheltered, deepwater harbour and a semicircle of mountains and has a population of around 150,000. The city is the central collecting and clearing point for all imports and exports from Mauritius and its dependencies and is connected by road to the rest of the island. Sugar accounts for over 90 percent of domestic export value. Port Louis has Anglican and Roman Catholic cathedrals, a natural history museum and an art gallery, and several libraries, educational institutions, publishers, and research institutes.