The annual festival – named ‘La Batalla del Vino’ in Spanish – is held on 29 June for St Peter’s Day.

It starts with traditions that have been maintained for three centuries, including a procession with the town mayor, and a pilgrimage to the Hermitage of San Felices de Bilibio, the patron saint of Haro – before the battle of wine begins.

Now enjoyed by tourists and locals alike – although total numbers are down from 2014, according to Spanish news outlet Cadena SER – attendees wear all white clothing and throw wine at each other from buckets and jugs. Some also use water pistols, as shown above.

As well as the Rioja wine, revellers enjoy other local delicacies, including chorizo and morcilla sausages.