© 2006 John Wilson, All Rights Reserved.
The wall was built mostly from Kentish ragstone and was 5 m high and 2 to 3 m wide, including a number of bastions, enclosing an area of approximately 330 acres (1.3 square km).
The panorama shows one of the best-preserved remaining bastions at the Barbican Estate in the City of London, now surrounded by some of the tallest residential buildings in the UK.