This square is one of the most beautiful and renowned spaces of the historic area. From here, you can access the church and convent of Santa Bárbara, which was founded in the 15th century as a beguinage around a chapel dedicated to the saint and later extended in the 17th and 18th centuries. Two interesting medieval reliefs mark the entrance. The first, at the outer door, is an extraordinary late Gothic representation of Last judgement, with Saint Michael weighing the souls; God the Father between the sun and the moon holding Christ; Saint James the Apostle accompanied by a traveller and Saint Francis with a friar, completing the scene. The second relief, perhaps from the original building, is reused on the arches of the atrium leading to the convent's simple chapel. It is a tympanum with images of the Virgin, Saint Catherine, and Saint Barbara.
In 1809, the French forces used the convent to house their troops and the nuns had temporarily to leave. Nowadays it is inhabited by a small, cloistered community of the Discalced Poor Clares of Santa Bárbara.