History Construction of Gibson Hall first began in 1862, when the directors of the National Provincial Bank decided to rebuild their offices in Bishopsgate in the City of London. They hired esteemed architect, John Gibson, to take charge of the job, following his work as an assistant to the architect of the Houses of Parliament, Sir Charles Barry. Upon its completion in 1865, the building was the largest banking hall in London. Having gained Grade I-listed status in 1950, the banking hall was closed later in the 20th century when National Provincial Bank and Westminster Bank merged. It has been available for hire as a private events venue since 1990.