Antonio Gaudi’s La Sagrada Famiglia in Barcelona is a fascinating structure. Not only has it been under construction since 1882, but it can arguably be considered as one of the earliest examples of the application of parametric design.

Gaudi used models as design tools, especially ones using chains hung from ceilings, or strings with small weights attached. La Sagrada Famiglia in Barcelona It has been known for centuries that a chain suspended from its ends results in a curve that naturally distributes the tension…