For enquires concerning the competition, summer academy and festival concerts, please contact:

Peter Ouwerkerk, general manager
+31 (0)6 2842 6540 (only during the Festival)

Bank account details:
IBAN: NL77 INGB 0670 9604 38
BIC: INGBNL2A (or, if a longer code is requested: INGBNL2AXXX)

Account holder: Stichting Internationaal Orgelconcours
The name and address of the bank is:
ING Bank N.V.
Foreign Operations
PO Box 1800
1000 BV Amsterdam
Please choose for the transfer costs ’OUR’

KvK: 41223348

VAT: NL0027.83.873.B.01

For enquires concerning guesthouses for academy students during the Festival, please contact:

Maaike Wijbrandi

The address of the foundation:

Stichting Internationaal Orgelconcours
M. Vaumontlaan 1
NL-2101 EC Heemstede
The Netherlands

For questions about marketing and public relations:

Frijkje Bakker en Lalita van Lamsweerde (STARTPR), marketing and communication
E-mail: |
Phone: +31 (0)6 5756 6899

For questions to the board of the Stichting Internationaal Orgelconcours (SIO), please contact the general manager.

For questions regarding the Müller Organ, Cavaillé-Coll organ, municipal organ recitals and visits to the organs, please contact:

Anton Pauw, City Council Haarlem
+31 (0)23 511 3460

If you wish to receive the annual diary of the municipal organ concerts, please send a mail to:


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