The latest in the series in which we ask you to identify where in London this picture was taken and what it’s of. If you think you can identify this picture, leave a comment below. We’ll reveal the answer early next week. Good luck!

Congratulations to Janet Holmes – this is, of course, a bastion which formed part of the old London City wall near what was Cripplegate and is now in the Barbican estate. Made largely of stone shipped from Maidstone in Kent, the five metre high wall had a two metre deep ditch in front of it and was dotted with these bastions. It stood largely intact from Roman times until the medieval period. For more on the wall, see our earlier post here.