The Cathedral of Notre Dame of the Sea is located in the eastern part of the Gothic District. It is the most perfect Gothic building in Barcelona. It maintains a pure Catalonian Gothic style with a sacred fire nearby. Opening hours: Monday to Saturday: 9.00 - 13.30, 16.30 - 20.00. Sundays and holidays: 10.00-13.30, 16.30-20.00. Tickets: Most of the time is free, depending on the situation.