Karl Marx 1818-1883 stayed here 1866

Colour: blue

Wikimedia:

Flickr:

See also...
Spudgun67 on Wikimedia Commons
London, United Kingdom
Frank Batt on Flickr
Ramsgate, United Kingdom
Megalit on Wikimedia Commons
London, United Kingdom
Eltelf on Wikimedia Commons
Ventnor, Isle of Wight, United Kingdom