Jérôme-Joseph de Momigny (20 January 1762 – 25 August 1842) was a Belgian/French composer and music-theorist.
Momigny was born in Philippeville, Belgium. He composed music and wrote books including Momigny, which he printed himself.
His theories about rhythm and musical phrasing were ahead of his time. From 1803 to 1806, he published his most notorious work Cours complet d'harmonie et de composition, d'après une théorie neuve et générale de la musique (in three volumes). It features, among others, a new theory about the significance of the upbeat over the downbeat, which was later taken up by
Hugo Riemann.
He died in the Charenton asylum.
