We are planning to visit La Sagrada Familia in mid-March. I’m planning to purchase our tickets in advance, including the Nativity Tower and the audio guide. I want to be able to see the windows with the sunlight shining through. When I try to purchase tickets, the La Sagrada Familia time is 30-45 minutes before the tower time. We would like to visit the Tower before touring La Sagrada Familia. If I purchase the 9:30 or 10am Tower, can I visit La Sagrada Familia afterward? What time should I be there in order to enjoy the light shining through the windows. I don’t want to be there so early that I miss the beauty of the light through the windows. Thank you for your help.