The practice of running the bulls through the streets of Pamplona began with the need to move them from the country to the arena for bullfighting.

It is thought the bull-running part of the festival dates back to the late 13th century, with the first official celebration of San Fermin held in 1591 when the religious, commercial and bullfighting festivals were combined and moved to July.

Held in honour of Saint Fermin, the inaugural festival was far more low-key compared to that of today.

By night, Pamplona’s streets erupt into an enormous party with drunken revelers and brass bands spilling from the many bars.