343 George Street, Sydney, Heritage bank building in central business district, Sydney, Australia.

343 George Street is a nine-storey former bank building in Sydney's central business district, designed by Kent & Massie and built by Stuart Brothers from 1921 to 1925 in the Inter-war Commercial Palazzo style. Its ground and lower ground floors hold the former banking chamber and safe deposit area, fitted with Australian marbles and bronze finishes; upper floors are offices.

Built between 1921 and 1925, the building served as headquarters for the Commercial Banking Company of Sydney for many decades. National Australia Bank took over operations later, making it a symbol of banking evolution in the city.

The building was the heart of banking activity in Sydney for decades and shows how important this street was for the city's finances. Visitors today can see original details that reveal how much craftsmanship and security mattered to banks of that era.

The building sits in the financial district and is easy to reach on foot, with retail areas on the ground floor accessible for public viewing. Upper floors contain private offices, so visits are limited to the publicly accessible areas.

The circular Chubb safe deposit vault door in the basement is the earliest of its kind in Australia; only one other exists, also in Sydney. The banking chamber and safe deposit area keep their original Australian marble finishes, considered the most intact of any early 20th-century bank interior in the city.