Sir Banister Flight Fletcher (15 February 1866, London – 17 August 1953, London) was an English architect and architectural historian, as was his father, also named Banister Fletcher. They wrote the standard textbook A History of Architecture, which is also often referred to just as Banister Fletcher.
Fletcher trained at King's College London and University College, London, and joined his father's practice in 1884, also studying at the Royal Academy Schools, the Architectural Association, and the École des Beaux-Arts, Paris. He became a partner in 1889, and on his father's death in 1899 took over the practice, which continued to be called Banister Fletcher & Sons. Fletcher worked closely with his younger brother Herbert Phillips Fletcher (1872–1916) as well as his father. Herbert was also a partner in the family firm and they wrote some books together. He was "regarded as a minor figure in the modernist movement" in his early career, and generally preferred to write rather than design.
Banister's work as an architect included:
In 1908 he qualified as a barrister at the Inner Temple, and undertook arbitrations and advice on property matters.
He was knighted in 1919 and elected president of the Royal Institute of British Architects (RIBA) in 1929 (until 1931). Fletcher was surveyor to the Worshipful Company of Carpenters, and became Master in 1936, a position also held by his father.
He married twice, first, in 1914, to Alice Bretherton (d.1932) and again in 1933. He had no children.
He and his father wrote the first edition of A History of Architecture on the Comparative Method. This became a standard reference work, with updated editions published throughout the 20th century.
There was a major revision with the 6th edition in 1921, when much of the text was rewritten by Fletcher and his first wife. This was over twenty years after his father’s death, and for this edition his father’s name was dropped, and the very numerous drawings replaced by new ones by George G. Woodward and others. According to J. Mordaunt Crook this edition concentrated 'on supplying an epitomised history of world architecture' such that 'Fletcher turned a useful handbook into a veritable student's bible.' Fletcher produced the sixteenth edition shortly before his death in 1953.