Saint Catharine's especially welcomes visitors, not only on Sundays but also on weekdays, according to the schedule below

Opening hours:

2009
   25 april t/m 5 mai 10:30-16:30
      6 mei t/m 29 mai 13:30-16:30
   30 mai t/m 12 sept 10:30-16:30
     14 sept t/m 31 oct 13:30-16:30

Reservations by  email:
kosters@catharijnekerk.nl
 

Entrance fee Church and tower:   €1,00

Groups (min 10 persons) outside these hours only on  appointment