Long ago, two siblings named Romulus and Remus were born to a Roman Princesss named Rhea Silvia and the war god, Mars.
The twins' father was worried that the boys would overthrow him, and decided to put the twins on a basket and set them floating down the Tiber River.
Luckily, the twins were found by a She-Wolf, who raised the twins, and a woodpecker, who fed the twins. Eventually, the twins were found by a shepherd and his wife who raied the boys as their own children.
One day, Remus was captured and taken to king Amulius. Romulus freed Remus, and together the siblings killed the king and took his throne in a joint rulership.
The two brothers decided they wanted to found their own city. They disputed, Romulus prefering Palatine hill while Remus favored Aventine Hill. They set out building their own city, but one day, Remus made fun of Romulus' wall. In a fit of fury, Romulus killed Remus.
After Remus' death, Romulus went on to found his city (named Rome, after himself). He set up his own social classes and his own army. The city soon grew so as to envelop many of the surrounding hills, including Aventine.