He is the winner of an important number of international first prizes, including Prague Spring Competition and the Grand Prix de Chartres. In February 2023 he was appointed titular organist at Saint-Sulpice in Paris alongside Sophie-Véronique Cauchefer-Choplin, as a successor to such musicians as Charles-Marie Widor, Marcel Dupré, Jean-Jaques Grunenwald and Daniel Roth.
Karol is the guest of such venues as the Philharmonie de Paris, Auditorium de Radio France, MÜPA Budapest, Warsaw Philharmonie, NOSPR Katowice, NFM Wroclaw, Auditorium de Lyon, Auditorio Madrid, BOZAR Brussels, Palais Montcalm in Quebec, Konzert, Dresden Philharmonie, Hamburg Elphilharmonie. He also performs with such orchestras as the Orchestre Philharmonique de Radio France, Orchestre National de France, NFM Wroclaw Philharmonic Orchestra, Orchestre national de Lyon, or the Odense Symphony Orchestra, under Myung-Whun Chung, Kent Nagano, Andris Poga, Jacek Kaspczyk, Antony Hermus, Mikko Franck, Fabien Gabel, Giancarlo Guerrero, Cristian Măcelaru or Lawrence Foster. In 2023, Karol played the world premiere of Unstern, organ concerto by Philippe Hersant, with the Orchestre National de Lyon and Antony Hermus.
This same year, he was artist in residence at NOSPR Katowice, after having held a similar position at Radio France for three seasons. Still in 2023, he was the first organist ever to receive an ICMA orchestra award.
Karol Mossakowski seeks to keep music alive thanks to improvisation, to which he gives an important role in his recitals and develops in silent film accompaniment. In 2017 his accompaniment of Dreyer’s Jeanne d’Arc for Lyon’s Festival Lumière was released in DVD on Gaumont.
In 2021 he released his first solo album, Rivages, featuring works from Bach, Mozart, Mendelssohn, and Liszt connected by improvisations, on Radio France’s label. Two years later, he recorded Poulenc’s organ concerto and Jongen’s Symphonie Concertante with the NFM Wroclaw Philharmonic Orchestra and Giancarlo Guerrero, an album that was released in 2023 and critically acclaimed internationally by the media.
As a composer, this season he wrote Visages Célestes for mixed choir and two organs, premiered at Saint-Sulpice in 2025 with the ensemble Sequenza 9.3 and Catherine Simonpietri. Composer in residence at the Festival de musique sacrée de Saint-Malo from 2021 to 2023, he wrote several works in this context, including Les Voiles de la Lumière, oratorio for three organs and mixed choir, as well as Trois Versets for three organs.
In 2014/15 he was appointed Young Artist in Residence at Cathedral of St. Louis King of France in New Orleans (USA). In 2017-2023 he was the titular organist of Lille’s Cathedral alongside Ghislain Leroy. He is professor of improvisation at the Higher School of Music in San Sebastián (Musikene).
Karol Mossakowski started the piano and the organ at three years old with his father. After musical studies in Poland with Elżbieta Karolak and Jarosław Tarnawski, he entered the organ, improvisation, and composition classes at the Paris Conservatory as a student of Olivier Latry, Michel Bouvard, Thierry Escaich and Philippe Lefebvre.
