By the 17th century pirate attacks prompted the building of extensive city defenses colossal forts, a chain across the harbor mouth, and prominent city walls making Havana the Bulwark of the West Indies. 
Pirate attacks against Havana spurred the building of colossal forts.
Mosquito attacks against Havana spurred the building of colossal forts.
A group of people sit in spaceships
A man reading on a park bench.
Construction workers work with power tools.
Data and information is collected on land purchases.
There is a collection of impressionists on display.
Three humans and a dog in a lake.