Bernhard Joachim Hagen (April 1720 in or near Hamburg (?) – 9 December 1787 in Ansbach) was a German composer, lutenist and violinist. He was the last important composer of lute music in 18th-century Germany.
Little is known about his youth, but he grew up in a musical family; his brother Peter Albrecht Hagen (also called Peter Albert van Hagen, 1714 - 12 September 1777) studied the violin with Francesco Geminiani, learned to play the lute and organ, and was an organist in Rotterdam. There are several transcriptions of Geminiani's violin works for lute by J.B. Hagen extant.
The younger Bernhard Joachim Hagen must have learned to play lute and violin early too, for in 1737 he was already employed as an assistant to Bayreuth violin virtuoso and Kapellmeister Johann Pfeiffer; later he was listed officially as a court violinist. He kept this position at the Bayreuth and since 1769 the Ansbach court until his death. Adam Falckenhagen and Charles Durant (Karol Duranowski), also called to the Bayreuth court by Wilhelmine of Bayreuth, may have further trained him in playing the lute.
In 1745, Hagen married Anna Fikentscher (born in Bayreuth; died 22 May 1789 in Ansbach). During 1760/1761 he visited his brother in Rotterdam and there gave five concerts from November till March.
Hagen was employed at the Bayreuth court as a violinist and as a lutenist, and his virtuoso lute performances and his compositions for lute were known and appreciated. He is one of the most important composers for lute in the era following Sylvius Leopold Weiss, and far more important than his teachers Falckenhagen and Durant. His style is shaped by the Empfindsamkeit and the beginning of the Sturm und Drang period. There is a clearly discernible influence of Carl Philipp Emmanuel Bach in Hagen's music.
Through margravine Wilhelmine's efforts, lute music flourished in the 18th century one last time before being rediscovered in the 20th century.
There are 33 known compositions by Bernhard Joachim Hagen found in the Staats- und Stadtbibliothek Augsburg:
The facsimile editions of Hagen's solo lute sonatas (1983) and chamber works (1984) have been published by Joachim Domning for the Roman Trekel Musikverlag.
There are three acclaimed CD recording of Hagen's sonatas by the lutenist Robert Barto:
Some of Hagen's works listed in the 1769 Breitkopf catalog (these have no concordances in Augsburg manuscripts) are presumed missing.
The lute sonatas of Roman Turovsky-Savchuk (a contemporary lutenist-composer) were written in homage to Hagen.