is a vast project by an artist Epos 257 ↗ consisting of numerous parts. The central piece is a Mosaic made of Z3 chevron traffic signs, situated on a blank wall of a house in Na Knizeci, Prague. The form of the mosaic was created through a systematic exploration of the city, which is graphically demonstrated on a map of Prague – the Grid. The individual signs were obtained during a long-term operation in the public space and during Roadwork. The Exhibition at the National Gallery in Prague introduced not only the creative process.