You’d have thought that being mother to God would take up all of your time, but you’d be wrong. In fact, as with her Son, not even death has been able to put a stop to the activities of the young woman from Nazareth, and on 1 August 1218 Mary appeared in a vision to a young Catalan named Peter Nolasco, instructing him on how to continue his work of redeeming captives. 

During the seven-and-a-half centuries of conflict between Christian and Muslim Spain a common feature was the taking of captives for ransom. Now this was all very well if you were a member of the nobility and had someone to pay for your release, but many Christians from poor families were also captured in the general trawling for profit and plunder that took place during a gaza (a religiously sanctioned raid into the dar ul harb or house of war, that part of the world that had not accepted Islam). To be captured during a gaza was by definition to become a slave, a state which could be escaped only by conversion to Islam (which many prisoners did) or redemption.

It was this work of buying out of slavery the ‘poor of Christ’ that Peter Nolasco embarked upon, helped by his background as a merchant. In fact, Nolasco switched from buying goods to buying people, but all his efforts seemed only to swell the number of captives held in Muslim hands.

It was at this point that he received his vision of the Blessed Virgin, who advised him to form an order dedicated to the redemption of captives. The next day Nolasco sought an audience with the king, Jaume I, who received him well and agreed to help in the foundation of the Order of the Virgin Mary of Mercy of the Redemption of Captives (or Mercedarians as they are called). The order set up a redemption fund to buy back captives but, if all else failed, each member of the order took personal vows to hand himself over in place of a prisoner. The best estimate we have is that the order brought 11,615 slaves out of captivity between 1218 and 1301.

If that wasn’t enough, Our Lady of Mercy delivered the whole city of Barcelona from a plague of locusts in 1637. A grateful city adopted her as patron and celebrated her feast on 24 September, or at least it did until Franco clamped down on all things Catalan. But sometimes things suppressed simply wait for an opportunity to burst forth, and that’s precisely what happened with the Festes de la Mercé. What had been a simple religious feast turned into a week-long celebration of Catalan identity, all inextricably bound up with a long-dead Jewish girl. But then, what else would we expect of her?