Pi
![](https://www.gijsvankuik.nl/wp-content/uploads/2011/05/2011-2-a-pi-1024x768.jpg)
![](https://www.gijsvankuik.nl/wp-content/uploads/2011/05/2011-2-b-pi-1024x768.jpg)
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 you can see galaxies floating.