"A great building must begin with the unmeasurable, must go through measurable means when it is being designed and in the end, must be unmeasurable." - Louis Kahn
A sectional model of La Sagrada Familia showing more clearly the second level that runs the perimeter and would hold the choir.
The upside-down sandbag model Gaudi used to determine the stresses a loads on the structure of La Sagrada Familia - and also determining its shape somewhat.
Gaudi's small working models investigating various ways to use straight lines to construct curves and using these curved surfaces as structure.
A small school next to La Sagrada Familia where Gaudi implemented some of his design ideas shown in the models above.