text:  The light inside is unbelievable. So, which building are you talking about? Well, it's of course the Sagrada Familia in Barcelona in Spain, famously designed by Antoni Gaudi, but never finished by him. The presenter on this episode of Witness History is Vicky Farncombe. We hear from New Zealand architect Mark Burry, who first saw Gaudi's fantastic creation during a holiday, and is part of the team who finally put the finishing touches on his vision.