The organ in St. Peter and Paul's Church in Ratingen, built by Romanus Seifert & Sohn in Kevelaer, was inaugurated on September 4, 1953, by Prof. Josef Zimmermann, organist at Cologne Cathedral.
In 1998, it was restored and modified by Siegfried Sauer / Höxter as part of a comprehensive church renovation.
The organ was revoiced by Bernhard Watermeyer of the Sauer / Höxter company using the same wind pressures as in 1953.
In 2006, the console was extensively restored by the builder Romanus Seifert & Sohn, Kevelaer, and equipped with an electronic bus system and MIDI interface. On the south side, the organ was given a swell tower with freely couplable SOLO registers Tuba magna 16-8' and a large (double-stopped from e°) string Stentorphon 16-8', as well as a 5-stop Cornet belonging to the SOLO in the main section. An internal Tuba pontificale 8-4' was added as a chamade under the vault above the pedal voices.
The wind system was supplemented by two additional motors. The guiding principle was to preserve the Ratingen organ as a contemporary witness to the post-war organ movement and to optimize its sound in keeping with the organ-building tradition of the Seifert company in Kevelaer.
Its romantic repertoire and warm intonation are complemented by strings and reed stops in the low register, without eliminating the rich timbre and neo-baroque specification. The instruments in the Marienbasilika in Kevelaer (1907) and St. Matthias, Berlin (1958) served as models for the design and scaling.
On June 29, 2012, a new mobile console was inaugurated in the church, financed entirely by donations.
Finally, in 2016, the long-planned project of a choir organ to accompany choir and ensemble music and for services in the high choir was realized by Seifert/Kevelaer behind the high altar.
Seven stops were installed on a single-tone slider chest, which can be used effectively and in a variety of ways thanks to the SINUA system.
Today, St. Peter and Paul's Church has a “fluid” organ system that has grown over the years, divided between the main organ in the west on the gallery and the choir organ behind the high altar in the east.