Aristide Cavaillé-Coll; (4 February 1811 – 13 October 1899) was a French organ builder. He has the reputation of being the most distinguished organ builder of the 19th century.
He pioneered innovations in the art and science of organ building that permeated throughout the profession and influenced the course of organ building and organ composing through the early 20th century. The organ reform movement sought to return organ building to a more Baroque style; but since the 1980s, Cavaillé-Coll's designs have come back into fashion.
After Cavaillé-Coll's death, Charles Mutin maintained the business into the 20th century. Cavaillé-Coll was the author of many scientific journal articles and books on the organ in which he published the results of his researches and experiments.
He was the inventor of several organ stops such as the flûte harmonique. His most famous organs in Paris are in Basilique du Sacré-Cœur, Basilique Sainte-Clotilde and Église de la Madeleine.
Henry Willis (27 April 1821 – 11 February 1901), also known as "Father" Willis, was an English organ player and builder, who is regarded as the foremost organ builder of the Victorian era. His company Henry Willis & Sons remains in business.
Albertus Antonius Hinsz (also: Albert Anthoni Hinsch, * 1704 in Hamburg , † March 17, 1785 in Uithuizen , Netherlands) was an organ builder in the Netherlands , who continued the tradition of Arp Schnitger .