Under visitor rule 13.6, the Sagrada Família checks your bags and personal belongings at the entrance. Metal detectors are used at the Basilica entrance. Rucksacks slow the security check. Visitors under 16 must be accompanied by an adult.
The Sagrada Família bars food and drinks brought from outside, along with dangerous items and narcotics. Eating and smoking are prohibited throughout the grounds. Drinking is only allowed outside the building.
Bring the photo ID matching the name on your Sagrada Família ticket. Sagrada Família tickets are valid only for the booked date and time. Late arrivals cannot enter. You cannot return after leaving the Basilica grounds.