http://en.wikipedia.org/wiki/Thomas_Harrison_(architect)

http://www.brunningandprice.co.uk/architect/history/

http://en.wikipedia.org/wiki/File:Propyleum,_Chester.jpg

http://www.chesterwalls.info/castle2.html

http://guttae.blogspot.com.es/2009/07/thomas-harrison-chester-castle-1788.html

http://guttae.blogspot.com.es/2009/07/thomas-harrison-chester-castle-1788.html

http://guttae.blogspot.com.es/2009/07/thomas-harrison-chester-castle-1788.html

http://guttae.blogspot.com.es/2009/07/thomas-harrison-chester-castle-1788.html

http://guttae.blogspot.com.es/2009/07/thomas-harrison-chester-castle-1788.html

http://guttae.blogspot.com.es/2009/07/thomas-harrison-chester-castle-1788.html

http://guttae.blogspot.com.es/2009/07/thomas-harrison-chester-castle-1788.html

http://guttae.blogspot.com.es/2009/07/thomas-harrison-chester-castle-1788.html

http://guttae.blogspot.com.es/2009/07/thomas-harrison-chester-castle-1788.html

http://guttae.blogspot.com.es/2009/07/thomas-harrison-chester-castle-1788.html