A UNESCO World Heritage Site and the purest expression of De Stijl architecture ever built. Designed by Gerrit Rietveld in 1924, the house looks like a three-dimensional Mondrian painting: intersecting planes of white, grey, red, yellow, and blue, with no visible boundaries between inside and outside. The upper floor has almost no fixed walls — sliding panels allow the entire space to be reconfigured from open plan to separate rooms.
Visits are by guided tour only, booked through the Centraal Museum (which administers the house). The tour is excellent, demonstrating the sliding walls and explaining how the design was revolutionary not just aesthetically but socially — the house was designed for a woman who wanted freedom and flexibility in her domestic life. Located on the eastern edge of the city, a short bus ride or 20-minute cycle from the centre. Essential for anyone interested in modern architecture or design.