Columbia subject headings:
Piracy--Economic aspects--Europe.
Piracy--History--13th century--14th century--15th century--16th century.
Harvard subject headings:
Maritime terrorism--Europe--History.
Piracy--Europe--History.
Smuggling--Europe--History.
Princeton subject headings:
Piracy--Economic aspects--Europe.
Piracy--History--13th century--14th century--15th century--16th century.