schuilkerk<\/em> (clandestine church) that dates from the Reformation, when open Catholic worship was outlawed."}">
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Museum Amstelkring: Museum Amstelkring

Museum Amstelkring

Museum Amstelkring (Ons' Lieve Heer op Solder, "Our Lord in the Attic"), built 1661 inside a private house. Amsterdam, The Netherlands.

Credit: Holly Hayes