Throughout this territory (and especially in the province of Gipuzkoa), French organ makers such as Aristide Cavaillé-Coll, Stoltz Frères (Paris), Mutin, Didier, Merklin, Gutschenritter and Puget built, from 1856 onwards, many organs of varying sizes and characteristics. Likewise, the German organ maker Walcker built, from 1885 onwards, various organs in the region. To this influx of foreign organs must be added the important contribution made by Spanish organ makers (the majority being of Basque-Navarrese origin) such as Aquilino Amezua, Roqués, Lope Alberdi, Melcher, Eleizgaray, Amezua y Cia. and Dourte, who joined in the construction of romantic style organs from 1882 onwards. This process came to an end in 1941 with the creation of the neoclassic organ by OESA (Organería Española Sociedad Anónima), which set up its workshops in Azpeitia (Gipuzkoa).

This extraordinary richness in romantic organs acted as the breeding ground and channel of expression through which several generations of composers went on to develop their creativity headed by the Navarrese Felipe Gorriti, who was to lead the transition from Baroque to Romanticism, publishing his first Romantic works around 1880.

NOW, the selection of the most important works of the digest for pipe organ (59 scores ) correspondents to 26 authors. More than 500 pages with Commentaries and biography of the authors in four languages. (Spanish, Basque, French and English).