Beautiful Barcelona and the genius of Gaudi
These are catenary arches!
Under the roof of Gaudí's Casa Milá, Barcelona, Spain
The catenary is the shape of a hanging flexible chain or cable when supported at its ends and acted upon by a uniform gravitational force
(its own weight).
Don't confuse! These are not parabolic arches!
Arches in Casa Mila, by Gaudi too!