Plaza de la Trinidad (Trinity Square), a square in the old town at the foot of Mount Urgull, was chosen as the main location of the Festival. This square was built in 1963, designed by the architect Peña Ganchegui to commemorate the centenary of the demolition of the city walls. Plaza de la Trinidad has been the main focus of the festival since then. The small area means that the audience is close to the stage, but in the mid 1970s more famous artists started to perform at Jazzaldia, so more spacious venues were needed, and the shows were moved to Anoeta Velodrome and the Sports Hall.