About 200AD the Romans built a defensive wall around the city.
This wall defined the shape and size of London for over a 1000 years. The area within the wall is now 'the City', the financial sector of London.
Parts of the wall can still be seen
Other parts of the wall can be seen on Noble Street near the Museum of London.
The remains can be seen below the Guildhall Art Gallery.
Clever light projections help you to imagine what it would have looked like.
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