A hidden treasure is an understatement in describing Museum Ons' Lieve Heer op Solder. Discover a rare and extremely well-preserved canal house from Amsterdam's Golden Age, with its narrow corridors and stairways and impeccably furnished living areas, kitchen and bedrooms. In the attic, discover a complete church, built by the wealthy Catholic merchant who owned the building when Catholic celebrations were banned in the Netherlands in the 17th Century.