Columbia subject headings:
City walls--Spain--Huesca.
Excavations (Archaeology)--Spain--Huesca.
Fortification--Spain--Huesca.
Huesca (Spain)--Antiquities.
Huesca (Spain)--History.
Harvard subject headings:
Architecture, Medieval--Spain--Huesca.
City walls--Spain--Huesca.
Fortification--Spain--Huesca.
Huesca (Spain)--Antiquities.
Princeton subject headings: