Romulus and Remus were born from a princess and Mars, the god of war. The king, however, feared the brothers may do something with their power.
The king ended up throwing them out, but a she-wolf found the two children and protected them for a while.
They were later found and raised by a few shepherds. One day, Remus was captured by the king who had thrown them out in the first place.
Romulus got a few shepherds together and saved Remus. The two brothers then killed the king. The people asked if they wished to rule over the land, but they declined because they wanted to found a city of their own.
Romulus and Remus had an argument over where they wished to build the city, so they both started cities of their own.
Remus jumped the wall of Romulus' city and made fun of it, which annoyed Romulus so much that he killed his brother. When finished, Romulus called his city Rome, after himself.