Columbia subject headings:
Harvard subject headings:
Heritage tourism--Germany--Mittelfranken--Congresses.
Limes (Roman boundary)--Germany--Mittelfranken--Congresses.
Tourism--Germany--Mittelfranken--Congresses.
World Heritage areas--Germany--Mittelfranken--Congresses.
Princeton subject headings:
Heritage tourism--Germany--Mittelfranken--Congresses.
Limes (Roman boundary)--Germany--Mittelfranken--Congresses.
Tourism--Germany--Mittelfranken--Congresses.
World Heritage areas--Germany--Mittelfranken--Congresses.