Brazilian street artists Os Gemeos have recently painted a mural in Milan, Italy. The mural is displayed on the side of the Pirelli HangarBicocca building. The brothers titled the mural “Efêmero” and they’ve applied their signature style to the piece. The brothers drew inspiration for the mural from the history of the building. The Pirelli HangarBicocca building was were they use to build trains.