Pirate ship anchor and defensive wall

The city of Campeche, founded in 1540, was continuously attacked by pirates, including Francis Drake, John Hawkins, Laurens de Graff, Cornelis Jol, Jacobo Jackson, Jean Lafitte, Francisco de Grammont, Bartolomé Portugués, William Parker, Francisco Nau, Edward Mansvelt, Henry Morgan, Lewis Scot, Roche Braziliano and Michel de Grammont, until the Spanish decided to build a defensive wall in 1686.

http://en.wikipedia.org/wiki/San_Francisco_de_Campeche