Oñati Square, with the façade of the Town Hall as a background is chosen as the stage for the an open-air concert open to all public, "A concert to be remembered" where the Orfeón Donostiarra together with the Banda de Musica Municipal de Bilbao will offer all the spectators a magnificent recital of about 1 hour, plus encores. Aita Gurea by P. Madina, el Caserío by J. Guridi and Kantaldia by I. Urkizo will be some of the pieces that will delight the ears of all those that on such an important date like that of the Virgin of Aranzazu choose to be in the Plaza Oñatiarra. During 2011, the ULMA Group has organised different initiatives to celebrate their fiftieth anniversary, there will be several events from now till the end of the year for this celebration, a popular luncheon for all the workers, a homage mass to all those workers who have passed away, the presentation of their book "50 years together" ... But undoubtedly, this “Concert to be remembered" will be the central and main event of this commemoration.