History Center Museum
696 Monterey Street
San Luis Obispo, CA 93401
San Luis Obispo Historical Museum is housed in one of California's Carnegie Library buildings in the downtown Mission Plaza area which offers a walkable visit. The exhibit space is not particularly large and expansive but the collections are definitely worth checking out, as the largest portion of artifacts are housed off-site and appear in rotating exhibits.
The Carnegie building includes a gallery, research room, and gift shop, plus nearby Dallidet Adobe and Gardens on 1185 Pacific Street in SLO.
The Carnegie Library building in San Luis Obispo was constructed / opened on February 12, 1903. Cost was $10,000. The Library operated under the History Center underwent necessary renovation for safety from 1998 to 2001. Today it offers a glimpse into the city's past, sitting on a hill and handsomely noticeable with its red brick and accenting stone design. Also attractive to the location is a mountain in the background.