The origin: Romulus and Remus
The origin of the legend of Romulus and Remus is in the Latin city of Alba Longa, ruled by King Numitor. The king was overthrown by his brother, Amulio, who murdered all of Numitor's sons, leaving only Numitor's daughter alive.
His daughter, called Rea Silvia, was forced to become a vestal, a kind of Roman priestess who was to remain a virgin. But Amulio's plan failed, since Rea Silvia fell in love with the god of War, Mars, and together they had two children, called Romulus and Remus.
Upon knowing Amulio the birth of the two children ordered them to be killed, but the person in charge was not able to kill two children and left them abandoned in the Tiber river. The current displaced them to a place between hills, and there they were found by the she-wolf Luperca, who took care of them and fed them for years. Later, they were found by a farmer Faustulo, who secretly raised Romulus and Remus.
When they grew up they were told the truth of his birth, so both brothers sought revenge. Both marched to Alba Longa, murdered Amulio and returned to the throne his grandfather, Numitor.
Romulus and Remus left Alba Longa with the idea of founding a city to govern. Romulus wanted to found Rome on the Palatine Hill and Remus wanted to found Remoria on the Aventine Hill. Both decided to check the flight of the birds, in the Etruscan way. Romulus saw twelve vultures flying over the Palatine and Remo only saw six in another of the hills. Been the winner Romulus.
Romulus drew some lines to mark the city limits of Rome, ordering that no one could cross them, but Remo decided to cross the lines, challenging his brother. This caused a fight in which Remo suffered injuries and died. From that moment, Romulus became the first king of Rome, being the date of foundation on April 21, 753 B.C.