Lazio is quite a special region speaking of Italian archaeology. Many Italic civilizations came and went before Etruscan civilization developing and then Roman's.
During pre-Roman time the area between river Tiber and swampy plain was called Latium Adictum while Latinum Vetus settled by Latins was on Sabines Mountains'. Lazio's borders changed so many times that cultural heritage of the region got wide and rich and still is.
There's an important evidence of Prehistoric human presence. Some traces date back to Lower Paleolithic like Casal dei pazzi. Important traces from Neolithic civilization were found as well, plus Appenines culture's and proto-Villanovan's of Bronze and Iron Age. At the beginning of I Millennium region is inhabited by Etruscans and by Italic ethnic groups in the South.
Etruscan civilization keeps flourishing all along I Millennium in the northern Lazio before to fall under Rome control and it's right here that we find evidence of Etruscan presence especially inside the beautiful necropolis. A few Italics tribes lived actually in the southern Lazio: Latins, Sabines, Volsci, Aequi and Hernici. Latins and Sabines allied in a federation of villages and on VII Century they built that very village that will become Rome.
In the final Roman Kingdome, Rome was crushed by Etruscan rule and was influenced by Greek culture. Ancient Roman civilization left the most amazing evidence of itself not only in the very city of Rome but also in many other cities nearby. Besides Rome was the main center of Christianity of which we can found large evidence in local necropolis and catacombs.