Bach’s Filiation

SUMMER CONCERTS – Every Tuesday 20.00

This is already the eighth year of the festival Ars in Cathedrali! The organ, choral and instrumental festival of the Cathedral of Saints Michael and Gudule brings us a new program of 8 concerts around JS Bach: what the great composer of Eisenach was influenced from ? Who are the ones influenced by him in return ? With the monumental great organ of Gerhard Grenzing, and the beautiful choir organ of Patrick Collon, the audience will most certainly be taken aback by the dynamism of internationally well-known ensembles and soloists.


Thank you for your attendance at our Bach’s Filiation Festival

Dear Organ Friends and lovers of the Cathedral Concerts,

The festival that took place every tuesday evening of the summer has been completed now last august 27th with the outstanding performance of 

« J. S Bach Concertos for organ and strings» by our home organist Bart Jacobs and Les Muffatti, Baroque orchestra.

We apologize to those for whom we could not offer a seat within the choir for this last concert. We were overwhelmed by its success.

We  invite you already for our 2020 summer festival under the theme of the 20th anniversary of the Grenzing Organ.




You can help financially the ARS IN CATHEDRALI by sending your donation to the BE10 0000 0000 0404 account of the Foundation Roi Baudouin indicating *** 182/0240/00181 ***. Donations of 40€ and more will benefit from a tax reduction. Thank you for your help !







Our Summer 2019 Program

Awaiting 2020, you find here the description and history of our 2019. Pictures taken during the festival can be admired here.

09 I 07 I 2019 › 20.00« Back to BACH »

Vlaams Radio Koor,  Peter Pieters, organ

Composers : Johann Sebastian Bach, Felix Mendelssohn, Johannes Brahms, Peter Cornelius

Program of organ pieces and the well-known motet “Jesu, meine Freude” by Bach, among motets of the German romantics composers, who were the pioneers of the rediscovery of the music fo the Cantor of Leipzig.

The first concert calls for the return to Bach : going back to Bach.

If we say we return to, does it mean that we ever left it? Yes in some ways, as this musician who became one of the best known was about to be forgotten.

J.S.Bach was an organist and composer of a great reputation but Vivaldi or Haendel enjoyed more fame.

Specially so when we count the number of edited worked in their life time. And the story of his Leipzig appointment can make us giggle. St Thomas’ church council hoped to get Telemann. But this one declined it. Then they called for Graupner. He declined it too. So were the council members’ words « Choosing Bach, we got the candidate of our third favorite » .

After Bach’s death, they said that he was forgotten, but we prefer say that he has stayed famous without been known. Forkel thinks Bach as one of the greatest composers of all time, stating words from 1798 on in the journal of l’Allgemeine Musikalische Zeitung, Berlin. Beethoven confirms Bach as « Urvater der Harmonie » (1801) . (Father of harmony). And Bach’s musical testament « Der Kunst der Fuge » was known to Mozart and Beethoven. We had to wait Mendelssohn for the definitive rediscovery of the works of the cantor of Leipzig.

16 I 07 I 2019 › 20.00 « Bach and Before : the masters of Bach »

Aurore Baal (F) lauréate ECHO 2018

Composers : Tarquinio Merulo, Samuel Scheidt, Heinrich Scheidemann, Matthias Weckmann, Johann Sebastian Bach

Bach juxtaposed by his Italian and North German predecessors, masters of counterpoint and in the art of variation on the Lutheran chorale.


23 I 07 I 2019 › 20.00 « Bach and After : pupils and influences »

Johannes Trümpler (D), Dom organist Kathedrale Dresden

Composers :  Johann Sebastian Bach, Ludwig Krebs, Naji Hakim, Erland Hildén

Bach said of Krebs: “A Crab in my stream” (der einzige Krebs in meinem Bach). He was Bach’s best student. By Naji Hakim, virtuoso and French composer, a piece built on 31 themes by Bach, and from Erland Hilden, Danish organist and composer, a Mass on B.A.C.H.


30 I 07 I 2019 › 20.00 « Improvisation in Bach perspectives »

Hayo Boerema (NL)


The Dutch composer and organist Hayo Boerema, main organist of the Grote of St. Laurenskerk in Rotterdam, improvises « à la Bach », and in other different styles, as well as in Baroque musical forms.


06 I 08 I 2019 › 20.00 « Bach himself : a whole Bach program »

Composer : Johann Sebastian Bach

Xavier Deprez, organiste de la  Cathédrale de Bruxelles

A program entirely dedicated to the works of Bach, built in the order of a mass, and alternating chorales and sonata in trio, toccata and preludes and fugues.


13 I 08 I 2019 › 20.00 « A musical name of four notes : B.A.C.H. »

Thomas Ospital (F) titulaire de Saint-Eustache à Paris

Composers :  Johann Sebastian Bach, Felix Mendelssohn, Robert Schumann, Franz Liszt, Thomas Ospital (improvisation)

The organist Thomas Ospital plays masterpieces built on the name of Bach, which correspond to the four notes of the scale : B flat, A, C, and B natural. He will also improvise on this legendary theme.


20 I 08 I 2019 › 20.00 « Bach expressionist : the extreme of the affects »

Jozef Still (D)

Composers : Johann Sebastian Bach, Max Reger

Max Reger was one of the German Catholic organists the most influenced by Bach’s music. The organist Jozef Still will guide us in his music made of great contrapuntal architectures served by registrations moving from the intimate pianissimo to the most sumptuous fortissimo.

27 I 08 I 2019 › 20.00 « J. S Bach Concertos for organ and strings»

Bart Jacobs, organ – Les Muffatti, Baroque orchestra

Composers :  Johann Sebastian Bach

The Muffatti and Bart Jacobs are back with an original program : reconstructions by Bart Jacobs of organ concertos of Bach based on  Sinfonias from his cantatas.

The CD recording of these concertos has earned this year a “Diapason d’Or” and the highest recordings in the whole world.