Portugal's small size and population restricted the empire, in the 16th century, to a collection of small but well defended outposts along the African coasts, the main exceptions being Angola, Mozambique and Brazil. For most of the 16th century, the Portuguese Indian Armadas, then the world leader navy in shipbuilding and naval artillery, dominated most of the Atlantic Ocean south of the Canary Islands, the Indian Ocean and the access to the western Pacific. The height of the empire was reached in the 16th century but the indifference of the Habsburg kings and the competition with new colonial empires like the British, French and Dutch started its long and gradual decline.