PichiAvo painted a mural in Bristol in 2016 that depicted Poseidon, God of the sea. The project was powered by Upfest, who invited the Spanish duo of artists to perform on the sidewall of a local pub, next to a parking lot. The mural easily spread on the internet and many magazines and media posted it, becoming popular very quickly. Murals in Upfest don't last forever. After two years, another artist painted over the wall and Poseidon vanished. The ephemeral mural has become now permanent thanks to digital art. This new NFT titled "Rebuilding walls - Bristol" brings the mural to a second life, making it now eternal.