Sir John Smith Flett KBE FRS[1] (26 June 1869 – 26 January 1947) was a Scottish geologist. He was elected a Fellow of the Royal Society[1] in 1913, received the Bolitho Medal of the Royal Geological Society of Cornwall in 1917,[2] made KBE in 1925 and won the Wollaston Medal in 1935.
In the mid 1970s, the then new, glass-faced structure built in the grounds of the South Kensington Museums complex between the Geological Museum and the British Museum (Natural History) containing a lecture theatre, was named in his honour.