In 1973, sound engineer Ángel Barco and Hispavox’s Classical Director, María Francisca Bonmatí, recorded a Gregorian Chants album titled Obras Maestras del Canto Gregoriano as a tribute to Santo Domingo de Silos on the occasion of the 900th anniversary of his death. The repertoire was performed by the Choir of Benedictine Monks of the Santo Domingo de Silos Monastery under the direction of Ismael Fernández de la Cuesta, a fine specialist in Gregorian and Medieval music and back then also Silos Congregation Prior. All recording sessions took place in the monastery chapel at night. This was to avoid the sound of the singing birds flying all over the cloisters and gardens as their nests were based in an ancient cypress tree in the corner of the main patio. During the night, while nature was asleep, the harmonic voices of the monks broke the magic silence of Silos with their soaring chants. The album’s phenomenal success in Spain led to its global launch and the record subsequently became an unparalleled international breakthrough, turning into a worldwide phenomenon over night. More than five million copies were sold and their triumph transformed the Monks of Silos into the most unusual music stars ever. The Monastery of Silos suddenly became a unique travel destination. Now, 40 years later, listeners can enjoy the Gregorian Chants for the first time in a re-mastered edition using the latest studio technology. The anniversary is a truly great occasion to once again savour and appreciate the timeless magic of these chants born in Silos.