Roman catholic church near Waterlooplein Market. As of 2014 the church is rented by the Sant'Egidio movement, which uses this as one of its church buildings.
On the website is some information in English about when the masses are celebrated in Amsterdam.

Address:
Waterlooplein 207, Amsterdam
Web:
http://www.santegidio.nl/gebed/

Opening hours:
Every Tuesday and Friday prayer service at 20:00hrs
On Sunday Holy Mass at 17:00hrs