Columbia subject headings:
Architecture, Romanesque--Scotland--Kirkwall--Congresses.
Christian art and symbolism--Medieval, 500-1500--Congresses.
Kirkwall (Scotland)--Buildings, structures, etc.--Congresses.
Norway--Relations--Scotland--Orkney--Congresses.
Orkney (Scotland)--Civilization--Congresses.
Orkney (Scotland)--Relations--Norway--Congresses.
St. Magnus Cathedral (Kirkwall, Scotland)--History--Congresses.
Harvard subject headings:
Kirkwall (Scotland)--Buildings, structures, etc.--Congresses.
Orkney (Scotland)--Church history--Congresses.
Orkney (Scotland)--Civilization--Congresses.
Orkney (Scotland)--History--Congresses.
St. Magnus Cathedral (Kirkwall, Scotland)--Congresses.
Princeton subject headings:
Orkney (Scotland)--Church history.
Orkney (Scotland)--Civilization--Scandinavian influences.
Orkney (Scotland)--History.
St. Magnus Cathedral (Kirkwall, Scotland)