"Rigo 23 (born Ricardo Gouveia, 1966) is a Portuguese muralist, painter, and political artist residing in San Francisco, California. He is known in the San Francisco community for having painted a number of large, graphic ""sign"" murals including: One Tree next to the U.S. Route 101 on-ramp at 10th and Bryant Street, Innercity Home on a large public housing structure, Sky/Ground on a tall abandoned building at 3rd and Mission Street, and Extinct over a Shell gas station.
Rigo was born and raised on the island of Madeira. He later established himself as an artist in San Francisco, earning a BFA from San Francisco Art Institute in 1991 and an MFA from Stanford University in 1997. From 1984-2002, Rigo used the last two digits of the current year as part of his name, finally settling upon "23" in 2003."