Columbia subject headings:
Harvard subject headings:
Pedro I, King of Portugal, 1320-1367--Journeys--Portugal.
Pedro I, King of Portugal, 1320-1367--Travel--Portugal.
Portugal--History--Pedro I, 1357-1367.
Visits of state--Portugal.
Princeton subject headings:
Pedro I, King of Portugal, 1320-1367--Travel--Chronology.