Design for Highclere Castle, Hampshire: perspective, 1840

http://www.architecture.com/FindOutAbout/DowntonAbbey/Tower.aspx#.Uo_o4MRLNz8

http://es.wikipedia.org/wiki/Castillo_de_Highclere

http://es.wikipedia.org/wiki/Castillo_de_Highclere

http://es.wikipedia.org/wiki/Castillo_de_Highclere

Highclere Castle, Hampshire, photographed in the 1880s

http://www.architecture.com/FindOutAbout/DowntonAbbey/Tower.aspx#.Uo_o4MRLNz8

Architectural design for the tower of Downton Abbey by Sir Charles Barry, 1842.

http://janeaustensworld.wordpress.com/2012/01/29/highclere-castle-floor-plan-the-real-downton-abbey/

Design for Highclere Castle, Hampshire: alternative elevations for the tower, by Charls Barry 1840

http://www.architecture.com/FindOutAbout/DowntonAbbey/Tower.aspx#.Uo_oIsRLNz8

Design for Highclere Castle, Hampshire: plan, section and elevations of the entrance doorway, by Charles Barry 1842

http://www.architecture.com/FindOutAbout/DowntonAbbey/Tower.aspx#.Uo_o4MRLNz8