California Historical Landmarks in San Francisco
California Historical Landmark 459
Mellus and Howard Site
555 Montgomery Street
In the Mellus and Howard Warehouse, erected on this site in 1848, the Society of California Pioneers, oldest historical society in the state, was organized August 31, 1850 to collect and preserve the history of California. W. D. M. Howard was its first president.
Citation from California Office of Historic Preservation