Romulus proceeded to found the city on the Palatine Hill and, to mark the boundary of the city, ploughed a furrow around the hill. He declared that if anyone ever crossed that furrow they would be put to death. However, Remus decided to jump over the furrow in contempt, and Romulus killed him.
The Romans saw Romulus and Remus as the founders of their city and as symbols of Roman strength and courage. They believed that Romulus was a great leader who had the support of the gods and that his twin brother Remus was a brave and loyal supporter.