Painting, Acrylic, Clay, Mixed Media, Oil Color, Spray Paint on Canvas 2017 W:100.00 H:100.00 D:7.00 cm The sustainability promotion was a driving factor for Sign #3,which is of 90% Eco-friendly media. The central sign bares multiple interpretation. It may be associated with rock art, the Nazca geoglyph or a runic sign, all of which bare a certain mysterious and sacred meaning. It may refer to a symbol of natural and cultural heritage, which needs to be protected.