2000 – forever, cobblestones in the pavement, 7 m per year Every  Saturday at 13 hour a stone is taken from the pavement along the canal ‘Oude Gracht’ in the city centre, a letter is carved at the spot by one of the contributors to this project, and put back in the pavement. Very slowly…

2015, ordinario marble, 46*10*5 cm This is most beautiful mathematical equation, named Euler’s Identity, because occur in it. This website of LifeScience gives an explanation.

2014, Belgian bluestone, 110*25*15 cm In my younger years I went backpacking through Colombia with a friend, including a bus trip across the three foothills of the Andes. For various reasons this bus tour was unforgettable, hence this mini Andes.

2014, Portugese marble, 35*12*8 cm At one of the conferences I attended as a TU Delft researcher, there was a small plastic item in the conference bag: a shape that defies the imagination of anyone who thinks he or she understands mechanics. Roughly the same form worked out in stone shows the same magic, which…

2013, 2 times 4 pieces of Belgian bluestone, mounted on a metal U-beam in ultramarine blue, 205*23*13 cm Artibus jury award A large solid sculpture is not feasible for an amateur sculptor, but several pieces in a row also make a large sculpture. The front of the fiercly and quitly swinging lines is 15mm wide.

2012, Belgian bluestone, 40*15*15 cm This image began with the title. Stones stand the test of time like no other material. Weathering is inevitable but the shape remains. This tooth outlives us.

2012, diabase, 85*20*20 cm

2011, Belgian bluestone, 3 times 35*25*13 cm

2011, diabase, 15*15*9 cm π (pi) is one of the most important symbols in mathematics, equal to the circumference of a circle divided by its diameter. The Greek symbol is beautiful (says this math aficionado), hence this three-dimensional version. The π is made in diabas, which after sufficient sanding gets a beautiful surface in which…

2011, ocean blue (granite), 30*30*30 cm Artibus Jury Award I wanted to model water, waves and surf, looked for a stone and came across ocean blue. With such a name and color that had to be the material. Unfortunately ocean blue is a type of granite, which can hardly be worked with hand tools. I…