Columbia subject headings:
City walls--Spain--Pamplona--Congresses.
Military architecture--Spain--Pamplona--Congresses.
Pamplona (Spain)--Buildings, structures, etc.--Congresses.
Harvard subject headings:
Princeton subject headings:
City walls--Spain--Pamplona--Congresses.
Excavations (Archaeology)--Spain--Pamplona--Congresses.
Fortification--Spain--Pamplona--Congresses.
Pamplona (Spain)--Buildings, structures, etc.--Congresses.