Columbia subject headings:
Cathedrals--France--Design and construction--Mathematics.
Geometry.
Harvard subject headings:
Architecture, Gothic--Mathematics.
Architecture--History
Cathedrals--Design and construction--Mathematics.
Church architecture--Mathematics.
Princeton subject headings:
Architecture--Composition, proportion, etc.
Cathedrals--Europe.
Christian art and symbolism--Medieval, 500-1500--Europe.
Geometry.