Bridge over untroubled moving waters = Trim, Ireland

I was at University with an Alison Trim, named after this place in Ireland... Trim Castle in the background and a picnic party in the 19th century (thanks to the National Library of Ireland)

Bridge over untroubled water, a photo by National Library of Ireland on The Commons on Flickr

Same bridge now the water has gone

View Larger Map .Same  Trim Castle now

View Larger Map
And The OS map showing where the river was in the 19th Century (follow link)
http://maps.osi.ie/publicviewer/#V1,680521,756536,7,9 

Warwick Castle, East Front from the Courtyard, Canaletto, 1752

Birmingham Museums and Art Gallery's Canaletto landscape of Warwick Castle got me musing

Warwick Castle, East Front from the Courtyard, Canaletto, 1752, a photo by Birmingham Museum and Art Gallery on Flickr.

the castle is still remarkably intact 

original photo  from Ramiro Nararas

...and very much as depicted in the Canaletto. Historic landmarks such as this help define the character and identity of a place. It lies on the banks of the Avon, and is now very much a tourist attraction, but once was a seat of immense power and prestige.