Havana was founded in 1519 by the Spanish. By the 17th century, it had become one of the Caribbean's main centers for ship-building. Although it is today a sprawling metropolis of 2 million inhabitants, its old center retains an interesting mix of Baroque and neoclassical monuments, and a homogeneous ensemble of private houses with arcades, balconies, wrought-iron gates and internal courtyards. Post card showing Morro Castle at the Havana Harbor. It was built in 1845.