Columbia subject headings:
Harvard subject headings:
John I, King of Portugal, 1357-1433.
Philippa, of Lancaster, Queen, consort of John I, King of Portugal, 1360-1415.
Royal weddings--Portugal.
Princeton subject headings:
Great Britain--Foreign relations--Portugal.
John I, King of Portugal, 1357-1433--Marriage.
Marriages of royalty and nobility--Portugal--History.
Philippa, of Lancaster, Queen, consort of John I, King of Portugal, 1360-1415--Marriage.
Portugal--Foreign relations--Great Britain.
Portugal--History--John I, 1385-1433.