Guglielmo Marconi [full inscription unknown]

See also...
Megalit on Wikimedia Commons
Rbirkby on Wikimedia Commons
Peter Reed on Flickr
Alwyn Ladell on Flickr
cazphoto.co.uk on Flickr
Robin Lucas on Geograph
Man vyi on Wikimedia Commons PD
Stuart Axe on Flickr
Kay Atherton on Geograph
Nick Harrison on Flickr
Nick Harrison on Flickr
Simply Jan on Flickr
Simply Jan on Flickr
Eugene O'Loughlin on Flickr PD 1.0
Nick Harrison on Flickr