What is the significance of Trojan mythology for the Greeks and the Romans?

The epics, stories, and legends about Troy were conceived as historical facts during the Greek and Roman periods. Artists, theologians, and sages from Greece and Rome used this event as a pedagological tool for the education of religious and historical subjects. The effect of the Iliad was so great that it became traditional for a group of poets to recite the Iliad and Odyssey from the start to the end at the festivals that took place every four years in Athens by Hipparchus' command. The fact that these epics were in the curricula of the schools in Athens also made more copies of this work available. The developing book trade in Athens in the fourth century B. C. E. also speeded up the spreading of these works to other areas. At the Royal Library in Alexandria, Xenodotus of Ephesus (300-260 B. C. E.), Byzantian Aristophanes (230-144 B. C. E.) and various other philologists of Antiquity conducted research on Homer. The Iliad interpretation of Aristarchos of Samothrake (Semandirek) especially played an important role in passing this work down to the following generations.

In Rome, there were fifty or so aristocrats who considered themselves to be from the "familiae Troyanae" (Troyan Dynasty). This artificially constructed aristocracy claimed that they had a historical mission. It is this so called "historical mission" that motivated them, while they chased their own various political agendas.