Did you know it's Rietveldjaar? Or that jaar is Dutch for "seven months"?
Anyway, Gerrit Rietveld designed four exhibition buildings, including a 1954 sculpture pavilion for Sonsbeek, which was recreated ten years later on a site the designer chose in the sculpture garden of the Kröller Müller Museum in Otterlo. It's rather beautiful, I think. Here are some more photos.