Columbia subject headings:
Harvard subject headings:
Alcácer do Sal (Portugal)--History--Congresses.
Lisbon (Portugal)--History--Siege, 1147--Congresses.
Princeton subject headings:
Portugal--Boundaries--History--Congresses.
Portugal--History, Military--Congresses.
Portugal--History--Afonso I, 1139-1185--Congresses.
Portugal--History--Afonso II, 1211-1223--Congresses.
Portugal--History--Sancho I, 1185-1211--Congresses.