How long did it take to build Rome?

Good question I read this one before

I love this question!  I'm not sure that I can give a perfect answer -- but I'll try to give a good one.

In a sense, Rome has been built from several hundred B.C. to the present day.  But the main buildings of Rome, at the height of its power, were built over approximately 300 years -- 100 B.C. to 200 A.D., give or take a few years.

You can see a timeline of Roman architectural history on this page.

Actually there are new findings that indicate that

Rome is called the eternal city  in my opinion , because she is being the  buildt eternaly Since the time of the first kings through the Republic the Empire (including he last one Romulus Augustus ) the city was renewed With Christianity the Popes became the great builders (like Julius II ) and today the Communist Mayor and his City Council are building , building and again building . Every visitor stuck in a Roman traffic jam will agree with me, that it will take an eternity to finish the building of Rome