However, the boys were rescued by a she-wolf who fed Romulus and Remus with her milk and took care of them. When the babies grew up, they were found by the shepherd Faustulus, who took them and brought them home.
When they grew up, they discovered who they really were, and decided to kill Amulis and put thier grandfather back on the throne.
Then, they decided to build a city of their own, but could not agree where to build it. Remus favoured the Aventine hill but Romulus wanted to use the Palatine hill. They could not reach an agreement and so each began to build his own city enclosed with walls.
Romulus was so annoyed that he killed Remus and said he would kill anyone who mocked his city or tried to break through the walls of Rome.
One day, Remus visited Romulus and made fun of his wall by jumping over it and saying how easily it could be breached.