These fascinating images show what Norwich would look like today if the gatehouses which were once part of the city's mighty medieval walls were still standing. 

Built between 1294 and 1343, Norwich's impressive defences kept the city safe from marauders, plunderers and invading armies for more than 500 years. 

And in order to allow traders and merchants to pass safely in and out of the city, there were 13 unique gatehouses placed at strategic points along the wall.  

Brazen Gate is still known by its medieval namesakeBrazen Gate is still known by its medieval namesake (Image: Derek Williams)

But between 1791 and 1808 all of the imposing gatehouses were demolished and today only fragments of the wall itself remain.  

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That is until YouTuber Derek Williams, who has more than 1,500 subscribers, recreated the landmarks in a series of mock-up images using drawings from Leo R. Jary's book "Through Ancient Gates: The Medieval Defences of Norwich".

There was once 13 gatehouses providing access in and out of the cityThere was once 13 gatehouses providing access in and out of the city (Image: Derek Williams)

Many of the city's most recognisable streets still share the same name as the gatehouse which once stood there, such as Brazen Gate and Bishopgate.

And even hundreds of years later, we continue to use the main roads and streets our medieval ancestors laid, tracing their history down St Stephens Street, Magdalen Street, Ber Street and beyond. 

Derek's "Norwich city walls and gates" video can be watched in full here.