The Koper Cathedral organ, designed by the famous French composer and organist Jean Guillou and obtained by the Parish of Koper with a successful candidacy in the international tender of the Zurich Tonhalle Hall, will be the second largest Slovenian instrument.

The grand symphonic organ has 4 manuals and 68 stops. When installed, it will be the largest church pipe organ in Slovenia. It was designed by Jean Guillou (1930-2019) and manufactured in 1988 by the German organ builders Kleuker and Steinmayer. Mr. Guillou was personally engaged in the project, supported it and worked in close collaboration with the project group.

The installation of the Koper Cathedral Organ will create a venue for top musical events in an ambience inhabited by the heritage of painters Vittore and Benedetto Carpaccio, the architecture of Giorgio Massari and enriched by the nearby baptistery, the Loggia and the Praetorian Palace in the central town square.