An unusual situation today: a Jesuit priest blessing the new underground passage of the Ons Lieve Heer Op Solder Museum. A project by Felix Claus, in which a new 3 level entrance building is linked to an old 'hidden' Catholic Church (schuilkerk) of the XVIIth century. A unique project and a blessing for this amazing small but precious hidden gem in the midst of Amsterdam's Red Light district. The city is truly blessed with this new piece of (underground) architecture.