The old chapter house (today Holy Grail Chapel, 1356–1369), where the canons met to discuss internal affairs, and the Micalet (belfry) (1381–1425) were initially separate from the rest of the church, but in 1459 the architects Francesc Baldomar and Pere Compte expanded the nave and transepts in a further section, known as "Arcada Nova", and finally joined both the chapter house and the Micalet with the rest of the cathedral, thereby attaining 94 metres in length and 53.65 metres in width.
Trije od štirih odsekov ladje in transeptov so bili tudi zgrajeni.