The sole remaining portion of the cathedral's original Romanesque design is the Plateras façade, which can be found on the south side of the transept. Elements from other parts of the cathedral were added to it over the decades after it was constructed between 1103 and 1117. The church and cloister flank the Plaza de las Plateras on two sides, while the Casa del Cabildo (Chapter House) stands next to the cathedral.

There are two archivolt- and tympanum-adorned doors at the entrance. Eleven connected columns support the archivolts; three are made of white marble (the center column and the two end columns), while the remaining eight are built of granite. The middle one shows the twelve prophets, while the ones on either side show the Apostles. Two windows on this floor include Romanesque archivolts, and a wide frieze separates the tympanums from the upper body by resting on a band supported by grotesque corbels.

Christ is featured prominently in the center of the frieze, surrounded by diverse characters and settings; to his right are six figures from the stone choir of Master Mateo, which was installed at the tail end of the 19th century. As many images as were salvaged from the crumbling façade of Azabacheras in the 18th century were added to the mix, the original iconographic arrangement was thrown off. Above the arches on the extrados are four angels with trumpets heralding the Last Judgement, and a central medallion shows the Eternal Father (or the Transfiguration) with open hands.

The left door's tympanum depicts Christ being tempted by the devil and his followers. Possibly Eve or the adulterous woman, the figure on the right is only partially clothed and holds a skull in her hands; she is not on her knees in prayer, but rather perched atop two lions. St. Andrew and Moses adorn the jambs. Outstanding Romanesque work by the master Esteban or master of the Plateras, depicting the creation of Adam and Christ blessing, as well as the biblical King David seated on his throne with his legs crossed, translucent through the fine fabric of his clothes, and playing a viola, personifies the triumph over evil. Many of the figures on this façade date back to the 18th century, when they were relocated from the Romanesque north façade or Paradise (now the façade of the Azabachera).

The right door's tympanum depicts many images from Christ's crucifixion and the worship of the three wise men. On one of the jambs is an inscription commemorating the event of the foundation stone being laid:

ANNO DOMINI (AD), MCMXLII (IDUS), MCMXLVII (JULII).
This inscription was made using the Roman calendar on 11 July 1103 in the Hispanic era. From another world, a fox can be seen devouring a hare, and in front of it, a poorly dressed woman is sitting with an animal on her lap. Other pictures of Christ on a throne, the creation of Eve, and the sacrifice of Isaac are propped up against the wall of the Berenguela Tower.