What exists now is just a fraction of what Gaudi's plan calls for. Only two facades are built so far: the Passion, and the Nativity which we will see on our way out. Yet to be completed is the Glory facade, which will be the largest and cover the main entrance to the church (the Passion and Nativity facades are technically side entrances). Construction of the Glory facade will actually require tearing down an apartment building across the street from the cathedral and tunneling that street underground so that it goes beneath the church.