In 1553 French pirates attacked Santa Cruz de La Palma, so they built
a small fort to defend the town from future attacks. This was just a
platform with a tower, and it was destroyed by flooding during a
storm in 1671. In 1676 work started on the current fort, and it was finished
in 1701.
It’s nothing like the tower of London, but then it didn’t need to be.
I wouldn’t want to try to force my way through the outer rampart with
18th century weapons, and access to the front door is via a wooden
bridge over a moat. If the people inside smashed the bridge, you’d be
trying to reach a doorway on the first floor. Inside, there’s a
dungeon, storehouse, a house for the man in charge and barracks for
the soldiers.
St. Catherine’s fort helped to repel Sir Francis Drake’s attack in 1585.
The modern statue on the seaward side is by Martin Chirino and
represents the trade winds.