Keith Seabridge on Flickr Roman Fortress. This plaque marks the site of the Porta Principalis Dextra or North Western Gate of the Roman Fortress of which the foundations as rebuilt circa A.D.300 lie just below ground. Bootham Bar, York by York Civic Trust Colour: bronze Wikimedia: Flickr: How to add yours Peter Hughes on Flickr Nick Harrison on Flickr Rachel Clarke on Flickr Lotte Worthington on Flickr Nick Harrison on Flickr Robin Sones on Geograph Google Streetview OpenStreetMap