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1961    Explosive Forces of Nature, AKU Fountain, Gele Rijdersplein, Arnhem, the Netherlands


1965    Column for Meditation, St. Paul, MN, U.S.A.


1968    Granny's Knot, Collection Kykuit, National Trust for Historic Preservation, bequest of Nelson

 A. Rockefeller, Tarrytown, NY, U.S.A.


1975    Meeting point, Schiphol Airport, Amsterdam, the Netherlands


1976    Forum / Ontmoetingsplaats, ‘t Breedveld, Amsterdam, the Netherlands


1976    Four times Two (Knot), City of Rotterdam, the Netherlands


1981    Friendship Knot, Little Tokyo, Los Angeles, CA, U.S.A.


1984    Junction, NOB (Dutch Broadcasting), Hilversum, the Netherlands


1989    Overhand Knot, Tax Offices, Maastricht, the Netherlands


1991    Knot for Queen (Overhand Knot), Palace Noordeinde garden, The Hague, the Netherlands


1992    Connection (Knot), Baarlo, the Netherlands



1997    Knot sculpture route, Baarlo, the Netherlands


1994    Friendship Knot, Bruyères, France


1996    Sentinel (Monument for the end of the Dutch Military Draft), Nassauplein, The Hague, the



2007    Four Sentinels on the bridge over the Maas river, Venlo, the Netherlands


2007    Remembrance (knot), Gildeschool Technodome, Venlo, the Netherlands

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