Sagrada Familia is the centre of Catholic morality and religion in Barcelona. In fact, it is the biggest Catholic church in Spain. Thus, in order to maintain the sanctity of the basilica visitors must be dressed appropriately according to the rules set in place. The dress code mentions the outfit familiar to that observed at any active Catholic cathedral clothing. As a religious establishment, Sagrada Familia holds the right to refuse entry into the basilica if visitors violate the dress code and are not in appropriate attire.