Height of ancient walls?

[Timianus]

Ahh, thanks. A local 'expert' said the walls were only original to the first 4 feet or so!
Thought it was dubious.. ;-)

I recall being told that by the local "expert" tour guide as well, although you can clearly see in a lot of places the demarcation of where different building materials/techniques were used.

Re: the height of the walls of Roma, I remember reading somewhere that the Auerelian walls were originally 30 ft or so, but where later doubled in height. The source escapes me at the moment.