Nick Harrison on Flickr Sir Alexander Fleming 1881-1955 discovered penicillin in the second storey room above this plaque St Mary's Hospital, Praed Street, W2, London Colour: maroon Wikimedia: Flickr: How to add yours Megalit on Wikimedia Commons Glyn Baker on Geograph Nick Harrison on Flickr Nick Harrison on Flickr Nick Harrison on Flickr Nick Harrison on Flickr Megalit on Wikimedia Commons Nick Harrison on Flickr Nick Harrison on Flickr Google Streetview OpenStreetMap See also... Nick Harrison on Flickr G. Raymond Rettew. A West Chester chemist, he pioneered the mass production of penicill... Ripleyvillagers on Wikimedia Commons Owen Massey McKnight on Flickr Alexander Fleming 1881-1955 biologist, pharmacologist and Nobel prize winner for the di...