Don't miss this canal-house museum with an unusual entrance on the Keizersgracht. Access is via the tradesmen's entrance (the old coach house) and then through the lovely garden to the rear of the house, which has its front door on the golden bend of the Herengracht. Built in 1687 for Albert Geelvinck and his much younger wife, Sara Hinlopen, it's been the home for Amsterdam's most notable families. The interiors are reconstructions though no less interesting for that. Enthusiastic curators will be only too happy to fill you in on some of the details. There are regular concerts, as the Sweelinck musical instruments collection is housed here.