Columbia subject headings:
Harvard subject headings:
Candles and lights--Germany--Freiburg im Breisgau--History.
Church buildings--Acoustics--Germany--Freiburg im Breisgau--History.
Church buildings--Lighting--Germany--Freiburg im Breisgau--History.
Electric lighting--Germany--Freiburg im Breisgau--History.
Freiburger Münster--History.
Princeton subject headings:
Candles and lights--Germany--Freiburg im Breisgau--History.
Church buildings--Acoustics--Germany--Freiburg im Breisgau--History.
Church buildings--Lighting--Germany--Freiburg im Breisgau--History.
Electric lighting--Germany--Freiburg im Breisgau--History.
Freiburger Münster--History.