This would be accompanied by two later water-processing plants with eye-catching designs (the 1974 Petrusplaat in the Biesbosch area and in the Kralingen neighbourhood of Rotterdam in 1977).
He had already designed the Kroller Muller Museum (finished in 1977), a low, rectangular glass-walled build in the middle of a forest and described as being "meticulously detailed and equally sober modernism at the service of art".
[8] The Maritime Museum in Rotterdam, completed in 1986, has been described by one critic "as demanding, but not inaccessible; finite, but not closed; austere ... but not cold.
"[9][10] He would continue in 1989 with a museum of science and education in The Hague (the Museon), whose geometric forms worked in tandem with the nearby Kunstmuseum by the early twentieth-century Dutch architect Hendrik Berlage and a museum hidden in sand dunes, the Beelden aan Zee, also in The Hague.
[12] He would continue to be involved in architectural debates in the Netherlands, particularly when he objected to modifications on some of his earlier buildings, for example the water works complex in Kralingen, and the town hall in Zeewolde.