To the sound of drums and the aroma of snails and perretxikos (wild mushrooms), every 28th of April there is a Tatoo and Procession of Drums to mark the beginning of the festival in honour of San Prudencio, the Patron Saint of Alava.

The city council of Vitoria agreed to hold this festival as far back as 1483. Since then, the festival has been held on the meadows of the village of Armentia, birthplace of San Prudencio, where every year large numbers of people from this province meet to enjoy the festivals of their patron saint.