Alan Turing 1912 - 1954 mathematician, computer pioneer and code breaker

Spudgun67 on Wikimedia Commons
Open Plaques on Flickr
Elliott Brown on Flickr
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St Catherine's College Library - St Catherine's College - Trumpington Street, Cambridge
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on 23 June 2012

Colour: blue

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See also...
David Anstiss on Geograph
Colin Smith on Geograph
Ctz on Wikimedia Commons
Peter Hills on Flickr
Elliott Brown on Flickr
Elliott Brown on Flickr
Elliott Brown on Flickr
Peter Hughes on Flickr
Nick Harrison on Flickr
Nick Harrison on Flickr
Spudgun67 on Wikimedia Commons