 He was by 1783 a piano builder in Paris, frenchifying his name to Louis Dulcken.His surviving instruments are a harpsichord and a number of pianos.Joannes Dulcken (10 September 1742 – 22 July 1775) was born in Antwerp; he was the son of Joannes Daniel Dulcken, upon whose death he moved with his mother, sister and brother-in-law to Brussels in 1764, where a workshop was set up.