The Bulfinch Building of the Massachusetts General Hospital is located on the hospital's main campus on Fruit Street in the West End of Boston, Massachusetts. It was designed by architect Charles Bulfinch, and built between 1818 and 1823, with a major expansion in 1844-46. A National Historic Landmark, it is an excellent example of Classical Revival architecture, and a rare surviving example of an early 19th-century public hospital building. The building is home to the Ether Dome, an operating theater which has been separately designated a National Historic Landmark as the site of the first public demonstration of the use of ether as an anesthetic.