The main façade has three portals, known as, respectively, "Puerta del Perdón" (Portal of Forgiveness, in the centre), "Puerta del Juicio Final" (Portal of the Last Judgment, to the right) and "Puerta del Infierno" (Portal of Hell, to the left).
Stolp ima dva dela: spodnji del, kvadratnega prereza, je oblikoval Alvar Martínez, zgornji, osmerokotni del je oblikoval Hanequin de Buselas.