Which Gothic cathedral in France has the largest interior volume?

Amiens Cathedral has the largest interior volume of any Gothic cathedral in France.

Located in Picardy, northern France, the cathedral was begun in 1220 after an earlier Romanesque church was badly damaged by fire. Its builders designed an exceptionally spacious High Gothic interior, measuring roughly 200,000 cubic metres—more than twice the volume of Notre-Dame de Paris.

Construction progressed unusually quickly for such a monumental church. The main building was largely completed within the 13th century, giving Amiens an unusual unity of style. Its soaring nave, pointed arches, rib vaults, flying buttresses, and expansive clerestory windows demonstrate the Gothic ambition to create taller, lighter interiors.

A common mix-up is confusing interior volume with height or length. Other French cathedrals may surpass Amiens in a particular measurement, but Amiens is the standard answer for largest interior volume. It has also been a UNESCO World Heritage Site since 1981.