Columbia subject headings:
Archaeology, Medieval--Congresses.
Excavations (Archaeology)--Switzerland--Solothurn--Congresses.
Solothurn (Switzerland)--Antiquities--Congresses.
Harvard subject headings:
Solothurn (Switzerland)--History--Congresses.
Switzerland--History--To 1648--Congresses.
Princeton subject headings:
Solothurn (Switzerland)--Church history--Congresses.
Solothurn (Switzerland)--History--Congresses.