Like its counterpart on the right side of the Obradoiro façade, this one was constructed atop an older Romanesque tower. In 1738, Fernando de Casas Novoa modeled it after the tower of the Bells built by Pea del Toro and Domingo de Andrade in the 17th century, and the result was a baroque façade decorated in a variety of styles.

Due to the impossibility of restoring the original carraca, a copy was erected in April 2010 and is now on display in the cathedral's museum. The new one is an exact replica of the original; it's even fashioned out of the same kind of chestnut wood. It's made up of a cross-shaped arrangement of four rectangular resonance boxes, each containing a reed that produces sound when the box is spun on a toothed axis and struck. This antique instrument, which is no longer employed in the liturgy, was formerly played during Holy Week services to grieve Jesus' death and to prevent the ringing of bells.