Open the same times as the church, the Museu Gaudí, below ground level, has interesting material on Gaudí's life and other works, as well as models and photos of La Sagrada Família. You can see a good example of his plumb-line models that showed him the stresses and strains he could get away with in construction. A side hall towards the eastern end of the museum leads to a viewing point above the simple crypt in which the genius is buried. The crypt, where Masses are now held, can also be visited from the Carrer de Mallorca side of the church.