In the columns of the central door and two side doors apostles are represented, as well as prophets and other figures, with their iconographic attributes. All are topped with its own capital which represent different animals and human heads with leaf motifs. All figures were multicolored and with his name on the books or scrolls they hold in their hands.
The four pillars of the portico are based on strong foundations which represent various groups of animals and human heads with beards. For some authors, these figures are images of demons, and symbolize the weight of glory (the portico in this case) crushes sin. Other sources give an apocalyptic interpretation, with wars, famine and death (represented by the beasts), situations that can only be saved by human intelligence (the heads of older men).