Well, I'm sorry to say that's not the correct answer. Normally I would accept only incorrect letters as guesses used up, but I'll give some mercy and call an end to this round. The correct answer is...
Londinium
...which is the ancient Roman name for the city of London. At the time I had started this round, I was going through a brief fascination with the Roman Empire, mostly thanks to replaying CivCity Rome, an old game I had last played several years ago. I've long since completed everything there was to complete in that game and moved on to something else.
Anyway, I took some time to think of a new word for the next round, and I think I've got one that should be rather interesting...
_ _ _ _ _ _
correct:
incorrect:
guesses left: 6