A tomb that was buried thousands of years ago and revered by ancient Romans as the resting place of their city's mythical founder Romulus has now been rediscovered beneath the Forum in Rome.The underground tomb and the temple built around it are thought to date from the sixth century B.C., according to archaeologists.Ancient Romans believed the tomb held the remains of their city's founder, but the stone sarcophagus that archaeologists just found inside the tomb is empty.The underground temple called a "hypogeum" in Greek contains a votive altar that was dedicated to Romulus, said Alfonsina Russo, the director of the Parco Archeologico del Colosseo, which oversees the city's ancient ruins.