Red square, blue circle, yellow triangle: The sequence can be traced back to the color and shape theory of the Bauhaus artist Wassily Kandinsky. Grellroth, a novelty concrete producer in Krefeld, Germany, adopts the artist’s style in the design of bee hotels it casts from self-consolidating concrete mixes, dosed with weather-stable Lanxess inorganic pigments.
Read MorePollinators’ pour
