One of the best preserved sections of the Roman wall surrounding Londinium can be found at Tower Hill (just next to Tower Hill underground station). This formed the eastern side of the city near to the Thames (and by the Tower of London, just off the picture to the right). They were probably constructed at the end of the second century AD; the upper section is medieval. The terminus post quem is provided by a coin of 183/4 predating the wall’s construction. The construction appears to have been completed by c. 210, again through numismatic evidence. Overall the wall was approximately 3 km in length. It may have stood as high as 6 m. The wall was constructed from ragstone that was shipped via the river Medway.
The wall is under the guardianship of English Heritage.