He designed San Diego 's first skyscraper , the twelve - story First National Bank of San Diego , in 1909 .
Burnham was also commissioned to design the Riverside County Courthouse in Riverside in 1903 .
Burnham designed San Diego 's first skyscraper , the twelve - story First National Bank of San Diego , in 1909 .
Burnham was also commissioned to design the Riverside County Courthouse in Riverside in 1903 .