Complex sentence: It corresponded to the central part of the modern administrative region of Lazio (Italy) and was the traditional territory of the Italic tribe known as the Latins, to which the inhabitants of the archaic city of Rome themselves belonged.
Split into simpler sentences: It corresponded to the central part of the modern administrative region of Lazio (Italy). It was the traditional territory of the Italic tribe known as the Latins, to which the inhabitants of the archaic city of Rome themselves belonged.