The Alexandria Hotel and Annex, also known as Plaza Hotel and Annex, is located at 840-844 Brown St. in Napa, California. Built in 1910, the hotel was a work of architect William H. Corlett. The hotel's design exemplifies the Mission Revival and Mediterranean Revival styles, which were both popular in California in the early 20th century. The design features three square towers on the street facing corners, overhanging eaves, and both slanted bay and rounded windows. The hotel's annex is older than the hotel and was redesigned to match the hotel's architecture when the hotel was built.