Maja Door, before the seventeenth-century repair, it was a simple structure: an hall with barrell vault and an external archivolt that is possible to admire walking down in Saint Pietro de Castro street.

In 1667 the Middle Ages structure of the main arch was completed with a more complicated one on the exterior part.

The structure was characterized by a solid and plastic seventeenth-century vestment, formed by a new arch with an archivolt characterized by elements with bosses and double semi-columns with Doric capitals, tympanum and architrave.