110 Plaza, Office tower in Civic Core, San Diego, United States.

110 Plaza is an 18-story office tower at 110 West A Street in downtown San Diego, completed in 1971 as the city's first all-glass high rise. Its exterior holds 142,000 square feet of bronze plate glass, and a Commonwealth Financial Network sign sits atop the north- and west-facing sides. The building header carries 32 tons of granite.

The building opened in September 1971 after a rapid construction period that took less than a year to complete. This swift development reflected the post-war economic growth that transformed downtown San Diego's business district.

The executive dining room served specialized dishes such as Green Turtle Soup and Frog Legs Sauté to bank executives and their guests.

The building stands at West A Street in downtown San Diego and is easily accessible by public transportation. Visitors can view the exterior facade and lobby area, though access to office floors is typically limited to building occupants.

The structure incorporates granite sourced from Quebec that was shipped to Italy for processing before being flown to California. This unconventional international construction supply chain reflects the ambitious building practices of the 1970s.