Columbia subject headings:
Harvard subject headings:
Pirates--Europe--History--Congresses.
Störtebeker, Klaus, -1401--Congresses.
Princeton subject headings:
Baltic Sea Region--History, Naval.
Denmark--History--1397-1448.
Hanseatic League--History, Naval.
North Sea Region--History, Naval.
Pirates--Baltic Sea Region--History.
Pirates--North Sea Region--History.
Störtebeker, Klaus, -1401.