Some things do not catch the eye until the sun shines, such as in the case of this work by Saar Oosterhof. She applied rhinestones in irregular distances from one another in the Pelsterstraat pavement. The stones only shine when they catch a ray of sun. The built-in holograms provide the stones with depth and their shape changes with every movement. Each stone was handmade by the artist from a cast mixture of resin, colour pigments and glitter. The rhinestones mark the place of a former Groningen town rampart.