Latium

n. ancient Italian region located southeast of Rome

Latium was a region of ancient Italy, home to the original Latin people. Its area is now part of the (much larger) modern Italian Regione of Lazio, also called Latium in Latin and also occasionally so in modern English. Their language later became the Roman language.
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Noun
1. an ancient region of west central Italy (southeast of Rome) on the Tyrrhenian Sea
(synonym) Lazio
(hypernym) Italian region
(part-holonym) Italy, Italian Republic, Italia

n. Latium, ancient Italian region located southeast of Rome

LAZIO